Of the plantation itself, only a fraction was under cultivation at one time. Tobacco was exceedingly exhausting to the soil, but the cheapness of land led the planters to neglect the most ordinary precautions to preserve its fertility. They sowed year after year upon the same spot, until the diminishing yield warned them of approaching sterility, and then would desert it to clear a new field. This system made it necessary for them to provide for the future by securing farms far larger in extent than was dictated by their immediate requirements. They had to look forward to the day when their land would become useless, and if they were provident, would purchase ten times more than they could cultivate at any one time. Thomas Whitlock, in his will dated 1659, says: "I give to my son Thomas Whitlock the land I live on, 600 acres, when he is of the age 21, and during his minority to my wife. The land not to be further made use of or by planting or seating than the first deep branch that is commonly rid over, that my son may have some fresh land when he attains to age."[6-22] One may gain an idea of the condition of the very poorest class of freemen by an examination of the inventory of the estate of Walter Dorch, drawn up in 1684. This man possessed two pairs of woollen cards, and one spinning wheel, valued at 100 pounds of tobacco, one chest at eighty pounds, four old trays at twenty pounds, two runletts at forty pounds, one pail and one skillet at sixty pounds, one bowl at two pounds, one feather bed, two pillows and three old blankets at 120 pounds of tobacco, three glass bottles at twenty pounds, one couch frame at forty pounds, one pair of pot-hooks at forty, 800 tenpenny nails at forty-five, and one old table and one sifter at twenty pounds. In all the estate was valued at 587 pounds of tobacco.[6-23] John Gray, who died in 1685, left personal property worth 9,340 pounds of tobacco, consisting in part of six cows and six calves, four yearlings, two steers, one heifer, one barrel of corn, one bull, ten hogs and one horse. He had no servants and no slaves.[6-24] In better circumstances was Richard Avery, who seems to have been a tanner by profession. The inventory of his estate, recorded in 1686, includes one horse with bridle and saddle, a cart and a yoke of steers, eight head of cattle, 25 hogs, 118 hides, various kinds of tools, lumber to the value of 400 pounds of tobacco, four pieces of earthenware, four beds with mattresses and covers, poultry to the value of 180 pounds of tobacco, some wheat in the ground and a batch of wearing linen. The entire personal estate was valued at 14,050 pounds of tobacco. It included no servants or slaves.[6-25]