The third momentous event in 1619 was the arrival of Negroes in a Dutch warship. They remained in Virginia, some finding homes, and some as indentured servants even as some white men were at that time. Nevertheless, this first arrival of Negroes was to lead to the introduction of slavery into the colony. It was more than a generation before the institution of slavery began to be entrenched as the backbone of the economic life in Virginia, yet this event of 1619 was the first move in that direction. [Illustration: _A typical view of the landscape on Jamestown Island. The high ground is principally along low ridges, sometimes called “fingers,” divided by marshes or very low ground._] Under Dale, the emphasis on colonization was away from Jamestown, yet later governors found the original seat desirable. Capt. Samuel Argall, who succeeded Yeardley as deputy governor in 1617, wrote that he advanced physical improvements prior to his hasty withdrawal from Virginia in the spring of 1619 to avoid arrest under charges of mismanagement of company affairs. Argall had been the first to prescribe limits for Jamestown. Yeardley followed him as governor, and for the next few years Jamestown, at this time most often called “James City,” witnessed considerable growth and activity. The town, long before, had expanded outside of the fort and spread along the shore on the extreme west end of the island. The borough or incorporation, of which it was the center, extended west to the Chickahominy River and downriver beyond Hog Island. Its territory was along the north side of the river and included the south side as well—the area that later became Surry County. West toward the Chickahominy the area adjacent to Jamestown Island became rather heavily developed and was referred to as the “Suburbs of James City.” The period from 1619 to 1624 was one of considerable activity for Virginia in general and Jamestown in particular. The reorganized Virginia Company, following its political changes, renewed its efforts to expand the colony and to stimulate profitable employment. Heavy emphasis was placed on new industries, particularly iron and glass, the latter evidently attempted a second time on Glasshouse Point. The planting of mulberry trees and the growing of silkworms were advanced by the dispatch of treatises on silk culture and silkworm eggs in a project in which King James I himself had a personal interest. Immigration to the colony was increased, and measures were taken to meet the religious and educational needs of the settlers. This was the period that saw the attempt to establish a college at Henrico.