164 Perspectives in American History Without major centers almost to the eve of the Revolution, Vir- ginia and Maryland were not without town life. The maps arc filled with places that contemporaries considered towns. If most of the county seats (or "Court Houses") in Virginia were little more than hamlets, there were somewhat more substantial commercial towns at the mouths of rivers (Norfolk and Yorktown) and more characteristically at the limits of navigation of the principal rivers: Alexandria on the Potomac (population 2,748 in 1790), Fredericks- burg on the Rappahannock (1,485 in 1790), Richmond on the James (under 2,000 in 1775), and Petersburg on the Appomattox (2,828 in 1790 but the most important tobacco shipping center), as well as Georgetown in Maryland. There were also even smaller but fairly busy little port towns along the rivers that handled local traffic and ships that could not or did not wish to venture up to the "heads" of navigation: Port Tobacco in Maryland, Dumfries on the Virginia side of the Potomac, Hobbs Hole on the Rappahan- nock. Busy or not, none of this latter group attracted very much of a population. The failure of Virginia and Maryland to develop any l.irgf cnrn». nJerciaLcenters betore 1775 (or even any middling centers before OJ/.SQ) has long perplexed historians and geographers. Moreover, it perplexed the people and leaders of the two colonies themselves in the seventeenth and eighteenth centuries. In general, royal policy favored town growth, and the legislatures of the two colonies passed numerous acts intended to encourage town growth, but all to very little effect. The most comnT">n ^q'hT^ion for the lack of towns in the Chesapeake has beerfgeographicalSAccording to this explanation, towns did not develop!!! ViigiitJa and Maryland because the area was so well endowed with waterways, the great Bay of Chesapeake itself, two hundred miles long, with the many rivers that flow into it. great and small, and the numerous tributaries ot those rivers. Ships could come from Britain or other colonies and deliver goods and pick up tobacco at the wharf ot the individual planter or coun- try storekeeper. There wras thus no need for a compulsory point of transshipment as at Philadelphia where wholesale dealers and greater