Thus in the end the slave was far cheaper. The price of a servant depended largely upon the cost of his passage across the ocean. We find that William Matthews, having three years and nine months to serve, was rated in the inventory of his master, John Thomas, at £12.[7-35] A servant of Robert Leightenhouse, having two years to serve, was put at £9;[7-36] while on the other hand we find another listed in the estate of Colonel Francis Epes, also having two years to serve, at only £5.[7-37] A white lad under indenture for seven years to Mr. Ralph Graves was valued at £10.[7-38] On the whole it would seem that the price of a sturdy man servant varied from £2 to £4 for each year of his service. On the other hand a vigorous slave could be had at from £18 to £30. Assuming that he gave his master twenty-five years of service, the cost for each year would be but one pound sterling. There could be no doubt, then, that in the mere matter of cost he was much cheaper than the indentured white man. It is true that the negro was none too efficient as a laborer. Born in savagery, unacquainted with the English tongue, knowing little of agriculture, it was a matter of some difficulty for him to accustom himself to his task in the tobacco fields. Yet when his lesson had been learned, when a few years of experience had taught him what his master expected him to do, the slave showed himself quite adequate to the requirements of the one staple crop. The culture of tobacco is not essentially difficult, especially when pursued in the unscientific manner of the colonial period. It required many, but not skilled hands. The slave, untutored and unintelligent, proved inadequate to the industrial needs of the northern colonies. The niceties of shipbuilding were beyond his capacities, he was not needed as a fisherman, he was not a good sailor, he was useless in the system of intensive agriculture in vogue north of Maryland. But in the tobacco field he would do. He could not at first tend so many plants as his white rival, he could not produce tobacco of such fine quality, but what he lacked in efficiency he more than made up for in cheapness. The African seems to have withstood remarkably well the diseases indigenous to eastern Virginia. There are occasional reports of epidemics among the slaves, but usually they were fairly immune both to malaria and dysentery. A census taken in 1714, when there were perhaps 15,000 negroes in the colony, records burials for sixty-two slaves only.[7-39] The births of slaves for the same year totalled 253.[7-40] These figures indicate not only the excellent physical condition in which these black workers were kept by their masters, but the rapidity with which they were multiplying. The low death rate is in part explained by the fact that only strong men and women were transported to the colonies, but it is none the less clearly indicative of the ease with which the African accustomed himself to the climate of tidewater Virginia.