. . "For the piirr>ose of making all necessary surveys, field notes, maps snd obtaining all necessary data, payment of saiarie.s, compensation, wages and expenses, trav?? eling or otherwise, of engineers, laborers, and other employees, and for ne<-eBsary supplies and malerlMls In mapping all such jyortlons of the Krle, f)swego, Champlain and Cayuga and Seneca canals, and of all lands belonging to" . . . . . .