One of the most interesting characters in the early history of Florida was George I. F. Clarke, an Englishman. He was engineer for the British Government during its possession of Florida and continued this work throughout the succeeding Spanish period and for many years after Florida’s cession to the United States. He is frequently referred to by name and reputation in American State Papers, Public Lands, especially Vol. IV containing the reports of the Land Commissioners appointed by the United States Government to pass upon land claims in Florida. Clarke made many of the surveys of royal grants, and was considered probably the highest authority on Florida lands during the territorial period.
Fleming, C. Seton
"George I. F. Clarke,"
Florida Historical Quarterly: Vol. 4
, Article 8.
Available at: https://stars.library.ucf.edu/fhq/vol4/iss1/8