The flood of Loyalists entering the province after 1780 prompted Governor Tonyn to detach at least 500 acres from Upper Crisp and grant it to Henry Ferguson, who had resided in Georgia and South Carolina before the war. He remained loyal to the Crown and was forced to escape to East Florida. In his memorial to the East Florida Claims Commission, Ferguson said "by his industry and assistance of a few slaves...he acquired a comfortable living." Fifty acres were cleared, fenced and planted by twenty slaves, who also constructed a new dwelling house and detached kitchen, slave housing, a corn crib and other buildings that overlooked the St. Johns River.Ferguson said his property was brought "to a flourishing condition" and was situated on a "navigable river 160 miles into the heart of the country, convenient for rafting naval stores and country produce, to the most commodious best in the Province." He was clearing £100 Sterling a year from the sale of his produce at the time the province was ceded to Spain. During the evacuation he lost several valuable slaves to bandits, including a carpenter, a cooper, two male field hands, and "a young wench, an excellent cook, washer and dryer of linen; likewise a good weaver." The bandits also took two work horses and two saddle horses.
Henry Ferguson's 500-acre refugee grant was located somewhere on the south shore of Doctors Lake.