Owing to the demand for servants and the cost of transporting them to the colony, it was seldom that any other than wealthy planters could afford to secure them. The wills of the first half of the 17th century show that few of the smaller planters even when they had attained a fair degree of prosperity made use of servant labor. Thus there was in Virginia at this period a class of men who owned their own land and tilled it entirely with their own hands. This condition of affairs continued until the influx of negroes, which began about the year 1680, so diminished the cost of labor that none but the smallest proprietors were dependent entirely upon their own exertions for the cultivation of their fields.[154] These men, like the wealthy planters, raised tobacco for exportation, but they also planted enough corn for their own consumption. Their support was largely from cattle and hogs, which were usually allowed to wander at large, seeking sustenance in the woods or upon unpatented land. The owners branded them in order to make identification possible.[155] Some of the small farmers owned but one cow and a few hogs, but others acquired numbers of the animals. The testament of Edward Wilmoth, of Isle of Wight County, drawn in 1647, is typical of the wills of that period. "I give," he says, "unto my wife ... four milch cows, a steer, and a heifer that is on Lawns Creek side, and a young yearling bull. Also I give unto my daughter Frances a yearling heifer. Also I give unto my son John Wilmoth a cow calf, and to my son Robert Wilmoth a cow calf."[156]