Adams, 47 S. W. 931, 146 Mo. 70, 82, 83; Bank v. Ragsdale, 171 Mo. 168, 185, 71 S. W. 178; Commerce Trust Co. v. Keck, 223 S. W. 1057, 283 Mo. 209, 223; Pollard v. Ward, 233 S. W. 14, 289 Mo. 275, 286; Grafeman Dairy Co. v. Northwestern Bank, 235 S. W. 435, 290 Mo. 311, 335; Vette v. Hackman (Mo.), 292 Mo. 138, 237 S. W. 802, 805.] While the doctrine of equitable estoppel is not generally applicable to municipal corporations in matters pertaining to governmental functions, yet courts, with much caution, may apply the doctrine in exceptional cases where upon all the circumstances of the case 'right and justice require it. [Peterson v. Kansas City, 23 S. W. (2d) 1045, 324 Mo. 454; State ex rel. Nolen v. Nelson, 275 S. W. 927, 310 Mo. 526, 541; City of Mountain View v. Farmers Telephone Exchange Company, 243 S. W. 153, 294 Mo. 623, 637; City of St. Joseph v. Railroad Co., 268 Mo. 47, 55, 186 S. W. 1080; Town of Montevallo v. Village School District of Montevallo, 186 S. W. 1078, 268 Mo. 217, 223; Simpson v. Stoddard County, 173 Mo. 421, 463, 73 S. W. 700; School Dist. v. Correll, 286 S. W. 136, 220 Mo. App. 322, 330; State of Iowa v. Carr, 191 Fed. 257, 267, 268; Spokane v. Spokane Falls, 33 Pac. 1072; City of Bradford v. Tel. Co., 56 Atl. 41, 42.; 4 McQuillin on Municipal Corporations (2 Ed.) sec. 1818, p. 821, et seq.]
Where relator in a quo warranto proceeding challenges the sufficiency of respondent’s return and moves for judgment on the pleadings, as was done in this case, the facts pleaded in the return must be taken as the facts in the case. [State ex inf. v. Merchants’ Exchange, 269 Mo. 346, 354, 355; 190 S. W. 903.] It thus appears that from November 16, 1922, the date of the expiration of the twenty-year franchise granted by the city of Sikeston to the Sikeston Electric Light Company, until July 15, 1931, the date of the passage of relator’s resolution directing respondent to vacate the city streets, avenues and alleys, and discontinue its electric business in said city, respondent and its immediate predecessors have constructed and maintained therein necessary electrical equipment and furnished electric service to the public in the city of Sikeston without any objection whatever on the part of said city; that during such period of nearly nine years, and for many years prior thereto, said city each year levied, assessed and collected taxes on respondent’s property in said city, and each year collected a license tax on respondent’s right to engage in. the electric business in said city and issued a license or permit to respondent authorizing it to engage in such business'therein,'respondent’s last license or permit extending to July 1, 1932; that during said period and for many years prior thereto the State of Missouri levied and collected from respondent and its predecessors a state franchise tax; that having pursued this course of acquiescence and consent for- more than two years with