I do not have any books at hand that specifically address your question. I am sure there were other helpers and planners. Let me quote you another bit from a book called: James City Co: Keystone of the Commonwealth by Martha McCartney.
"On May 1, 1699, a group of students from the College of William and Mary (already built in Wmsbrg), made a presentation to the House of Burgesses in which they advocated moving the capital to Middle Plantation. They claimed that "great helps and advances" had been made "towards the beginning of a town," for the fledgling community already had "a Church, an ordinary, several stores, two Mills, a smiths shop, a Grammar School, and above all the Colledge." One scholar pointed out that Middle Plantation's position between two navigable creeks made it well suited to trade and be save from enemy invasion. With little deliberation, the assembly voted to abandon Jamestown and passed "An Act Directing the Building the Capitoll and the City of Williamsburgh." The 220 acre town site lay in both James City and York Counties. Duke of Gloucester Street, which ran along a ridgeback that divided the drainages of the James and York Rivers and roughly separated James City and York Counties, formed the central axis of the town, which was to be laid out regularly into lots."