It shall be lawful for any person finding any such animal running at large to have the same impounded, and such impounding advertised within ten days from date of impounding, in one weekly newspaper for two weeks, published nearest the place where such animal is impounded, and if said animal be not reclaimed within twenty days after such advertised notice, by payment of all costs and charges, together with one dollar to the person causing the said animal to be impounded, (it) shall be sold at public sale, and the amount realized from sale, less the said cost and charges, shall be paid to the treasurer of the school district wherein such animal is impounded.