causes of action upon the coupons was sufficient to give the court jurisdiction, regardless of the claims upon the bonds. The defendant in error therefore presented to the court below, by his causes of action upon his coupons alone, controversies between citizens of different states which involved more than the jurisdictional amount. The circuit court could not lawfully disregard these causes of action of which it had plenary jurisdiction because the defendant in error pleaded other causes of which it could not lawfully take cognizance. A federal court is not deprived of jurisdiction of causes of action of which it is authorized and required to take cognizance by the fact that the plaintiff has joined with them in the same action and petition other causes of which it has no jurisdiction. The objection to the jurisdiction of the court was properly overruled.

The chief complaint concerning the action of the court below, however, is that it held that the independent school district was estopped by the recitals in the bonds and in the resolution of the board of directors of the district township from defeating the coupons in the hands of an innocent purchaser either on the ground that neither the bonds nor their proceeds were used to pay judgments, or on the ground that the debt of the township exceeded the constitutional limitation when the bonds were issued. Many objections to this ruling have been presented. One of them is that the recitals in the bonds are not available to the plaintiff in an action on the coupons, and that the municipality can be estopped by them only in an action on the instruments which contain the recitals; that is to say, on the bonds themselves. But it is not indispensable to the effectiveness of an estoppel that the acts, words, or deeds which work it shall be contained in a negotiable instrument or in any written contract which is the basis of the action. They are as fatal when found in instruments not negotiable, in writings which are not the basis of the action, when they are mere spoken words, and when they are silent and deceitful acts, as they are when they are contained in a bond or note which is the subject of the action. In Southern Minnesota Ry. Extension Co. v. St. Paul & S. C. R. Co., 55 Fed. 690, 696, 5 C. C. A. 249, 255, 12 U. S. App. 320, 331, and in Board v. Platt, 79 Fed. 567, 573, 25 C. C. A. 87, 93, 49 U. S. App. 216, 224, judgments which were not the bases of the actions were held to constitute estoppels. In Union Pac. R. Co. v. U. S., 67 Fed. 975, 15 C. C. A. 123, 32 U. S. App. 311; Naddo v. Bardon, 51 Fed. 493, 2 C. C. A. 335, 4 U. S. App. 642; Commission Co. v. Patillo, 90 Fed. 628, 631, 33 C. C. A. 194, 197, 61 U. S. App. 94, 100; and in the Omaha Bridge Cases, 51 Fed. 309, 327, 2 C. C. A. 174, 241, 10 U. S. App. 98, 188,-silence and acquiescence wrought fatal estoppels. In Illinois Trust & Savings Bank v. City of Arkansas City, 76 Fed. 271, 294, 22 C. C. A. 171, 194, 40 U. S. App. 257, 296, 34 L. R. A. 518, the acts of the city dehors the contract upon which the action was founded worked a fatal estoppel against it. And in City of Huron v. Second Ward Sav. Bank, 86 Fed. 272, 30 C. C. A. 38, 57 U. S. App. 593, 49 L. R. A. 534; Hughes Co. v. Livingston, 104 Fed. 306, 43 C. C. A. 541; Grattan Tp. v. Chilton, 97 Fed. 145, 38 C. C. A. 84; Board v. Sutliff, 97 Fed. 270, 38 C. C. A. 167; and City of South St. Paul v. Lamprecht Bros.

Co., 88 Fed. 449, 31 C. C. A. 585, 60 U. S. App. 78,-the recitals in municipal bonds were held to conclusively estop the defendants in suits upon the coupons from maintaining defenses inconsistent with. the statements contained in the recitals. The principle of estoppel is broad and universal. It is that one who by his acts or representations, or by his silence when he ought to speak out, intentionally or through culpable negligence induces another to believe certain facts. to exist, and the latter rightfully acts on such a belief so that he will be prejudiced if the former is permitted to deny the existence of such facts, is thereby conclusively estopped from interposing such denial. It is as fatal when the deceitful acts or silence are without, as when they are within, the contract counted upon. The recitals in the bonds and in the resolution of the board were as available to the defendant in error to raise an estoppel against the district in an action upon the coupons as they would have been in an action upon the bonds.

It is said that the recitals in the bonds are ineffectual to create an estoppel because, while they declare that they were issued under the provisions of chapter 51, they show on their face that they were not so issued, because those provisions require the bonds to be payable to the holders of the unsatisfied judgments at the office of the treasurer of the county issuing them, while these bonds are payable to one who held no judgments at Sioux City, Iowa,-a city without the limits of the district township,-and the coupons are payable at the office of Weare & Allison, in Sioux City, Iowa. The objection is too technical and hypercritical for serious consideration. The statute. does not require the bonds to be payable to the judgment creditors, and there is no evidence that the plaintiff in error has been deprived. of an opportunity to pay either the bonds or the coupons by the fact that the place of their payment was the principal city in its county, instead of at the office of its treasurer. This immaterial variance from the form prescribed by the statute neither destroys nor weakens the plain declaration in the bonds that they were issued under the provisions of chapter 51, nor the conclusive estoppel which that recital produces.

Finally the old objections that neither the district township nor the officers had any power to issue the bonds or to make the recitals, that the recitals do not estop the township from defeating the coupons on the grounds that there were no judgments, and that the proceeds of the bonds were not applied to the payment of the judgments, which have been so many times urged upon and discussed by this court, are again rehearsed. To discuss them would be but to repeat former opinions of this court which have been again and again affirmed, and it would seem to be sufficient here to briefly state the propositions long since established by the decisions of the supreme court and of this court which render these objections of counsel for the plaintiff in error untenable. The affairs of the district township were intrusted to its board of directors to manage, direct, and control. Code Iowa 1897, § 2745. It was the duty of one of the members of this board (its president) to appear in behalf of the corporaticn in all actions brought against it, and to sign all warrants, orders,

drafts, and contracts made by it (section 2759), so that the financial status of the corporation and the number and amount of the judgments against it were necessarily within the knowledge of the members of this board. Chapter 51 of the Acts of the 18th General Assembly of Iowa empowered the board to adopt a resolution that its district township should issue bonds to pay any unsatisfied judgments rendered against it before the passage of the act, and authorized the president and secretary of the board to sign and issue these bonds upon the adoption of such a resolution. Laws Iowa 1880, c. 51. This chapter also authorized and directed these officers to issue these bonds in substantially the same form as was by law prescribed for county bonds, and that law provided that such bonds should contain a certificate or recital that they were issued under the provisions of the legislative act authorizing their issue, and in conformity with the resolution of the board which directed it. Laws Iowa 1878, c. 58. Now, it is well settled that, if the laws are such that there might under any state of facts or circumstances be lawful power in a municipality or quasi municipality to issue its bonds, it may by recitals therein. estop itself from denying that those facts or circumstances exist, unless the constitution or the act under which the bonds are issued prescribes some public record as the test of the existence of some of those facts or circumstances. Hughes Co. v. Livingston, 104 Fed. 306, 311, 43 C. C. A. 541, 547; Board v. Sutliff, 97 Fed. 270, 277, 38 C. C. A. 167, 173; National Life Ins. Co. v. Board of Education of City of Huron, 62 Fed. 778, 789, 792, 10 C. C. A. 637, 648, 651, 27 U. S. App. 244, 262, 265; Chaffee Co. v. Potter, 142 U. S. 355, 364, 12 Sup. Ct. 216, 35 L. Ed. 1040; City of Evansville v. Dennett, 161 U. S. 434, 443, 446, 16 Sup. Ct. 613, 40 L. Ed. 760; E. H. Rollins & Sons v. Board of Com'rs of Gunnison Co., 80 Fed. 692, 699, 26 C. C. A. 91, 98, 49 U. S. App. 399, 412; City of Huron v. Second Ward Sav. Bank, 86 Fed. 272, 279, 30 C. C. A. 38, 45, 57 U. S. App. 593, 606, 49 L. R. A. 534; City of South St. Paul v. Lamprecht Bros. Co., 88 Fed. 449, 453, 31 C. C. A. 585, 589, 60 U. S. App. 78, 85. In this case there might have been a state of facts under which the district township would have had the power to issue these bonds notwithstanding the fact that the constitutional limit of its indebtedness had been passed when they were issued. There might have been unsatisfied judgments rendered before the passage of chapter 51 which evidenced unimpeachable obligations of the district township incurred before its indebtedness reached its constitutional limitation. Neither the constitution nor the act under which the bonds were issued pointed out any public record as the test of the existence of this state of facts. The district township therefore had the power to issue the bonds, if such judgments existed, when they were issued; and it had the power to estop itself from denying their existence by reciting in the face of the bonds the fact that they did exist. The officers of the district township were expressly authorized to ascertain and certify the existence of these facts. They were empowered by chapter 51 to pass a resolution for the issue of the bonds for the purpose of paying such judgments, and such judgments only, and to certify in the face of the bonds that they were issued under the provisions of the act.

The legislature thereby intrusted to them the power, and imposed
upon them the duty, to ascertain, determine, and certify whether or
not every act had been done and every fact existed which conditioned
a lawful issue of the bonds before they sent them forth. The exist-
ence of judgments fundable under chapter 51 was the primary fact
intrusted to them to ascertain, determine, and certify, without which
no bond could be lawfully issued; and, when they certified that these
bonds were issued under the provisions of that chapter, they acted
far within the limits of the power and in the discharge of the duty
thrust upon them by the legislature of the state, and the necessary
effect of their certificate was to conclusively estop the township
from denying its truth for the purpose of defeating its coupons in the
hands of a bona fide purchaser. When a municipal body has lawful
authority to issue bonds on the condition that certain facts exist or
certain acts have been done, and the law intrusts the power to and
imposes the duty upon its officers to ascertain, determine, and certify
the existence of these facts at the time of issuing the bonds, their
certificate will estop the municipality, as against a bona fide holder
of the bonds, from proving its falsity to defeat them. Hughes Co.
v. Livingston, 104 Fed. 306, 313, 43 Č. C. A. 541, 548; National Life
Ins. Co. v. Board of Education of City of Huron, 62 Fed. 778, 792,
793, 10 C. C. A. 637, 651, 652, 27 U. S. App. 244, 266, 268; West
Plains Tp. v. Sage, 69 Fed. 943, 948, 16 C. C. A. 553, 558, 32 U. S.
App. 725, 736; E. H. Rollins & Sons v. Board of Com'rs of Gunni-
son Co., 80 Fed. 692, 699, 26 C. C. A. 91, 98, 49 U. S. App. 399, 412;
Rathbone v. Board, 83 Fed. 125, 131, 27 C. C. A. 477, 483, 49 U. S.
App. 577, 589; City of Huron v. Second Ward Sav. Bank, 86 Fed.
272, 279, 30 C. C. A. 38, 45, 57 U. S. App. 593, 606, 49 L. R. A. 534;
Brown v. Ingalls Tp., 86 Fed. 261, 263, 30 C. C. A. 27, 29, 57 U. S.
App. 611, 615, 616; City of South St. Paul v. Lamprecht Bros. Co.,
88 Fed. 449, 453, 31 C. C. A. 585, 589, 60 U. S. App. 78, 85; Grattan
Tp. v. Chilton, 97 Fed. 145, 148, 38 C. C. A. 84, 87; Commissioners
v. Aspinwall, 21 How. 539, 16 L. Ed. 208; Bissell v. City of Jefferson-
ville, 24 How. 287, 16 L. Ed. 664; Moran v. Commissioners, 2
Black, 722, 17 L. Ed. 342; Meyer v. City of Muscatine, I Wall. 384,
393, 17 L. Ed. 564; Lee Co. v. Rogers, 7 Wall. 181, 19 L. Ed. 160;
Pendleton Co. v. Amy,. 13 Wall. 297, 305, 20 L. Ed. 579; City of
Lexington v. Butler, 14 Wall. 282, 20 L. Ed. 809; Grand Chute v.
Winegar, 15 Wall. 355, 21 L. Ed. 170; Lynde v. Winnebago Co., 16
Wall. 6, 21 L. Ed. 272; Marcy v. Oswego Tp., 92 U. S. 637, 23 L. Ed.
748; Town of Coloma v. Eaves, 92 U. S. 484, 23 L. Ed. 579; Moul-
trie Co. v. Rockingham Ten Cent Sav. Bank, 92 U. S. 631, 23 L. Ed.
631; Commissioners v. Bolles, 94 U. S. 104, 24 L. Ed. 46; Commis-
sioners v. Clark, 94 U. S. 278, 24 L. Ed. 59; Commissioners v. Janu-
ary, 94 U. S. 202, 24 L. Ed. 110; Warren Co. v. Marcy, 97 U. S. 96,
24 L. Ed. 977; Town of Pana v. Bowler, 107 U. S. 529, 2 Sup. Ct.
704, 27 L. Ed. 424; Town of Oregon v. Jennings, 119 U. S. 74, 7 Sup.
Ct. 124, 30 L. Ed. 323; Chaffee Co. v. Potter, 142 U. S. 355, 12 Sup.
Ct. 216, 35 L. Ed. 1040.

Notwithstanding all this, counsel for the plaintiff in error earnestly
argue that this district is not estopped from proving that the issue.

of these bonds increased the debt of the district township after its constitutional limitation had been reached, because the bonds contain no express recital that the debt they evidenced is not in excess of that limitation, and because the facts were that bonds to the amount of $10,000 were issued, when the fundable debt was less than $1,000, and when the debt of the county already exceeded its constitutional limit; and they cite the cases of Lake Co. v. Graham, 130 U. S. 674, 680, 9 Sup. Ct. 654, 32 L. Ed. 1065; Sutliff v. Commissioners, 147 U. S. 230, 235, 13 Sup. Ct. 318, 37 L. Ed. 145; Doon Dist. Tp. v. Cummins, 142 U. S. 366, 12 Sup. Ct. 220, 35 L. Ed. 1044; and Gunnison Co. v. E. H. Rollins & Sons, 173 U. S. 255, 19 Sup. Ct. 390, 43 L. Ed. 689,-in support of their contention. The opinions of the supreme court in these cases have been repeatedly reviewed by this court in the decisions which have already been cited. The reasons why they are inapplicable to a case like that now in hand, and why the position of the counsel for the plaintiff in error here cannot be sustained, were stated with some care in City of Huron v. Second Ward Sav. Bank, 86 Fed. 272, 278, 30 C. C. A. 38, 45, 57 U. S. App. 593, 607, 49 L. R. A. 534, and in City of Pierre v. Dunscomb, 45 C. C. A. 499, 106 Fed. 611, 617, which was decided at the last term of this court, and the opinion in which has since received the sanction of the supreme court by the dismissal of a writ of certiorari to review it. 181 U. S. 621, 21 Sup. Ct. 925, 45 L. Ed. 1032. They are briefly these: The fact that the debt of the township was in excess of the constitutional limitation when the bonds were issued is not material in this case, because, if the excess existed, the bonds were still valid if the recitals in them were true, and the township is estopped from denying their truth. The bonds could have been lawfully issued only to refund just debts of the district township evidenced by unsatisfied judgments. The recitals in the bonds that they were issued under the provisions of chapter 51 estopped the district township from denying (1) that there were just debts of the township, evidenced by unsatisfied judgments against it rendered before chapter 51 was enacted, which warranted the issue of the bonds, because a municipal corporation is estopped from defeating an action by an innocent purchaser to collect its negotiable bonds, which recite that they were issued for the purpose of funding the judgments, bonds, warrants, or floating debt of the corporation, on the ground that the apparent debt they were issued to satisfy was invalid or fictitious (Hughes Co. v. Livingston, 104 Fed. 306, 315, 43 C. C. A. 541, 550; City of Pierre v. Dunscomb, 45 C. C. A. 499, 106 Fed. 611, 616; City of Huron v. Second Ward Sav. Bank, 86 Fed. 272, 277, 30 C. C. A. 38, 43, 57 U. S. App. 593, 603, 49 L. R. A. 534; Ashley v. Board, 60 Fed. 55, 66, 8 C. C. A. 455, 466, 16 U. S. App. 656, 675, 709; Meyer v. Brown, 65 Cal. 583, 26 Pac. 281; Moran v. Commissioners, 2 Black, 722, 17 L. Ed. 342; Hackett v. City of Ottawa, 99 U. S. 86, 96, 25 L. Ed. 363; City of Ottawa v. First Nat. Bank of Portsmouth, 105 U. S. 342, 343, 26 L. Ed. 1127); (2) that the corporation and its officers have applied the bonds to the lawful purpose for which they appear on their face to have been issued (City of Huron v. Second Ward Sav. Bank, 86 Fed. 272, 277, 30 C. C. A. 38, 43, 57