What is a fair and reasonable compensation depends upon the amount allowed for such services by custom or usage locally prevailing among brokers. Hartman v. Warner, 75 Conn. 197, 52 A. 719; Williams v. Clowes, 75 Conn. 155, 52 A. 820; Semple v. Rand, 112 Iowa, 616, 84 N. W. 683; Thomas v. Brandt (Md. '93), 26 A. 524; Graves v. Dill, 159 Mass. 74, 34 N. E. 336; Ashby v. Holmes, 68 Mo. App. 23; Green v. Wright 36 Mo. App. 298; Lansing v. Johnson, 18 Neb. 174, 24 N. W. 726; Potts v. Aechtermacht, 93 Pa. St. 138; Insloe v. Jones, Brightly (Pa.), 76.See also Sec. 626.