|1894 Sketch of Shell Mounds (Partial) - Courtesy of the former Volusia Museum - February 2001 - Beth Vining|
|Temple Mound at Crystal River, Fl Photo supplied by the University of South Florida|
From "Certain Sand Mounds of the St. Johns River, Florida" by Clarence B. Moore, May 22, 1894 and Published for the Harvard College Library.
" It is probable that certain mounds were used as look-out stations, and possibly all in later times served for domiciliary purposes. The great mound at Tick Island, has an altitude of over 17ft, while the famous Mt. Royal, with a circumference of 555 ft, is in area approached by no mound on the St. Johns river.
Above images and text sourced from St. John's River Historical Society. Link here.