Thus a zone of almost continuous German settlements had been established, running from the head of the Mohawk in New York to the Savannah in Georgia. They had found the best soils, and they knew how to till them intensively and thriftily, as attested by their large, well-filled barns, good stock, and big canvas-covered Conestoga wagons. They preferred to dwell in groups, often of the same religious denomination--Lutherans, Reformed, Moravians, Mennonites, and many lesser sects. The diaries of Moravian missionaries from Pennsylvania, who visited them, show how the parent congregations kept in touch with their colonies[102:4] and how intimate, in general, was the bond of connection between this whole German frontier zone and that of Pennsylvania. Side by side with this German occupation of Valley and Piedmont, went the migration of the Scotch-Irish.[103:1] These lowland Scots had been planted in Ulster early in the seventeenth century. Followers of John Knox, they had the contentious individualism and revolutionary temper that seem natural to Scotch Presbyterianism. They were brought up on the Old Testament, and in the doctrine of government by covenant or compact. In Ireland their fighting qualities had been revealed in the siege of Londonderry, where their stubborn resistance balked the hopes of James II. However, religious and political disabilities were imposed upon these Ulstermen, which made them discontented, and hard times contributed to detach them from their homes. Their movement to America was contemporaneous with the heavy German migration. By the Revolution, it is believed that a third of the population of Pennsylvania was Scotch-Irish; and it has been estimated, probably too liberally, that a half million came to the United States between 1730 and 1770.[103:2] Especially after the Rebellion of 1745, large numbers of Highlanders came to increase the Scotch blood in the nation.[103:3] Some of the Scotch-Irish went to New England.[103:4] Given the cold shoulder by congregational Puritans, they passed to unsettled lands about Worcester, to the frontier in the Berkshires, and in southern New Hampshire at Londonderry--whence came John Stark, a frontier leader in the French and Indian War, and the hero of Bennington in the Revolution, as well as the ancestors of Horace Greeley and S. P. Chase. In New York, a Scotch-Irish settlement was planted on the frontier at Cherry Valley.[104:1] Scotch Highlanders came to the Mohawk,[104:2] where they followed Sir William Johnson and became Tory raiders in the Revolution.