This story is a follow-up to my post on American Loyalists (Liberty's Exiles, 6/30/11).
For years, there have been several shipwreck excavation projects off the coast of St. Augustine. Two of the cannons recently discovered off the coast of St. Augustine illustrate a link to the Loyalist history of Florida. See today's article from the Florida Times-Union:
For further interest, see the St. Augustine Lighthouse Archaeological Maritime Program (LAMP)