Hi Steve. Yes, I will look in my notes to see what I have on a John Cox. When they say East Florida, most times they are really talking about the city of St. Augustine. From there in 1784, all of those who wanted to go to Canada (Nova Scotia), went there on the "Argo" and landed in Nova Scotia in the summer.
Now it is my understanding that many of the Loyalists in E. Florida were already refugees of Georgia, N & S Carolina and surrounding areas having fled there to get away from the Americans after the fall of Charleston. Does this relate in any way to yout ancestor?
Give me a couple days and I will check on your John Cox. In the meantime, since John Cox may turn out to be a somewhat common name, is there any thing else you can tell me about him which would place him for me in the colonies previous and during the war?