IV. All propositions for the issuance of bonds submitted to the qualified electors of the City of Biloxi were authorized by the requisite number of votes. Board of Supervisors of Carroll County v. Smith, 111 U.S. 556, 4 S.Ct. 539, 28 L.Ed. 517; Cashman v. Entwisle, 213 Mass. 153, 100 N.E. 58; First Parish in Sudbury v. Stearns, 21 Pick, (Mass.), 148; Munce, et al. v. O'Hara, (Pa.), 16 A.2d 532; Ladd v. Yett, 273 S.W. 1006; Kansas City v. Orear, (Mo.), 210 S.W. 392; Sacramento v. Goddard, 200 Cal. 143, 252 P. 329; In re Validation of Bonds, City of Moss Point, 170 Miss. 886, 156 So. 516; State v. City of Miami Beach, 156 Fla. 546, 23 So.2d 720; State v. City of Miami, 53 So.2d 524; State v. Dade County, 54 So. 257; Harris v. Walker, (Ala.), 74 So. 40. The appellants' attack on the bond election constituted a collateral attack on the validation of the bonds and the same may not be sustained.