230 ESSAYS IN COLONIAL HISTORY a private road from Queenstown up the river.1* In Balti- more County by 1737 the roads had been pushed up as far as Peach Bottom on the Susquehauna, and possibly con- nected on up to the settlements in Pennsylvania." Thus within the span of forty years a large population had penetrated far into the interior to the north and west of the upper Chesapeake. Some of the tide-water people who went into this ter- ritory carried their tobacco culture with them.15 Never- theless, tobacco was not a suitable staple for this expan- sion. Its transportation is so difficult and injurious that this alone would have served to limit the inland extension of the crop.1" Even transportation by water was objec- tionable to the planters." But if the transportation prob- lem alone was not sufficient to turn the new settlers of the piedmont region away from the old staple, conditions in the tobacco trade strongly tended toward that result. During the early years of the German immigration to- bacco was so cheap that it scarcely paid the cost of pro- duction. The crop reached such a low ebb of prosperity that in 1748 the colony was forced in sheer desperation to adopt what was considered a most drastic inspection act. Though some relief came through this law, the crop con- tinued to be only moderately profitable.18 Grain, on the iť Upper House Journal, April 22, 29, 1736, in Md. Arch., XXXIX, 408, 483. 14 Baltimore County Court Records, appointments of overseers for the roads. "Frederick County Records. The Inventories and Administration Ac- counts often enumerate the crops on the land of the deceased. is Gould, Money and Transportation in Maryland, 1715-1765, pp. 142, 143 (Johns Hopkins Univ. Studies, Ser. XXXIII, No. 1). i' A notice in the Maryland Gazette, Feb. 10, 1774, says that the ship Annapolis will be moved from Annapolis to the Patuxent Eiver "in order to remove the apprehensions they [the Patuxent River shippers] seemed to have, of too long a water carriage for their tobacco in small craft," is N. D. Mereness, Maryland as a Proprietary Province, p. 116. THE RISE OF BALTIMORE 231 other hand, had just the qualities that tobacco lacked. The methods of its culture were well known to all the new settlers, and its transportation by either land or water was not difficult. But above all else, this was the period when grain was in the ascendency. The West Indies, southern Europe, Ireland, and even England were begin- ning to look to America for food. Consequently, in all the American cities, demand for grain was strong and prices were high. About 1750, two or three years after the enact- ment of the inspection law, a hundred pounds of tobacco was worth four or five bushels of wheat. To-day (1929) a hundred pounds of Maryland leaf is worth from twenty to thirty bushels of wheat. The high value of wheat as compared with tobacco in 1750 is obvious. It is not sur- prising, therefore, that all records attest the fact that wheat and corn were the staple crops of the western country.19 Thus it appears that between 1720 and 1750 there de- veloped a region in Western Maryland and adjacent parts of Pennsylvania that did not possess any of the conditions that had hitherto prevented an urban economy. But little grain could yet be marketed in England; and the "farmer," or grain grower, would find it difficult to deal with a captain of a ship who could not return with English goods. A complicated system of exchanges was necessary before the value of the grain sold could be transformed into the diversified manufactures needed. A merchant was required to conduct these exchanges, and wherever cereals became the principal crop a mer- cantile class had to develop. The dispersion of population over the west would have produced the same result even if grain had not become is Eddis, Letters from America, p. 130; Frederick County Records, pas- trim. The inventories especially show the normal crop pattern to consist of wheat, corn, and an occasional field of hemp, flax, or tobacco.