A recompense or premium offered by government or an individual in return for special or extraordinary services to be performed, or for special attainments or achievements, or for some act resulting to the benefit of the public; as, a reward for useful inventions, for tlie discovery and apprehension of criminals, for the restoration of lost property. See Kinn v. First Nat. Bank, US Wis. 537, 95 N. W. 9G9, 99 Am. St. Rep. 1012; Campbell v. Mercer, 108 Ga. 103, 33 S. E. S71.