In doing further searches ,you have the PUNTA GORDA version.
Yes,there is Capt John Riley,but in this version he is transporting 600oz of gold bullion (about 50lbs troy)which seems to be a more reasonable amout for the times.
Yes,he was chashed by Union forces,and "dragged himself and the gold into a bog east of Punta Gorda".
Punta Gorda is located on Charlotte Harbour which was used by CSA blockade runners and the cattle trade,so some of this is plausible for the Capt John Riley Bless McIntosh of the legend.
The only Union post in that area of Florida was at Fort Meyers.Under Capt Henry A Crane many raids were sent out to stop the CSA cattle trade,gold was the main unit of purchase.This verifies that gold was in this area during this time.
Also ,Crane sanctioned Lt James D Green to raid,loot,and burn the homesteads of those involved in the CSA cattle trade (Tillis and Underhill),who buried their gold for sakekeeping.A plausible explanation for the "buried" gold of the legend.
Capt James McKay Sr was the CSA commissary agent (aka-paymaster) at Fort Meade,and the transactions between cattle crackers and blockade runners went through him.A plausible explanation for the "paymaster" version of the swamp gold legend.
April 7,1864,the Little Battle of Bowlegs Creek,when Crane sent a detachment to Fort Meade,driving them out,killing one of the CSA guerillas,and pursuing the others into the swamps.A plausible explanation for the "chased" part of the legend.
Almost ALL versions this legend seem to have appeared in the late 1940's.
Is it possible that stories,tales,and local lore based on actual events,evolved into this legend as it was passed down through the generations?
Could the original 50lbs of gold bullion grown to a 1/2 with telling?
Could the gold be a cache of a Union harassed homesteader or a cracker rancher,and NOT part of the CONFEDERATE TREASURY?
...and is deep in the Everglades a logical place for one to bury a cache of gold?