This item spells out the sleuthing needed to properly locate this fort and also why it was there. At the same time we discover that the Spanish must have actively slaved the area out in order to support their plantations in the Caribbean.
Thus when this area was ultimately occupied by the Americans the whole region had been seriously depopulated allowing easy development. I have scant doubt that English slavers were ate work as well, except that the Spanish had the greater need and the long establish system. It was far easier for the English to simply grab a load of Irish and come back with product
At least now we can correct location errors and some history..
The site of Fort Caroline was 11 miles inland from the Atlantic, on the southern most channel of the May River. It was at the head of an oxbow in this channel. The Fort Caroline Memorial was six miles inland on the wide, straight, single channel of the St. Johns. There were no islands in its mouth.
Site plan of Fort Caroline
Site plan of Fort San Mateo
This light spectrum is on the boundary between visible light and infrared.