The belief that there existed a sizable clandestine traffic in Negro slaves between the island of Cuba and Florida after 1808 has been a persistent one in the historiography of slavery in the United States. There are, of course, many logical reasons for this persistence.
Kriple, Kenneth F.
"The Case Against a Nineteenth-Century Cuba-Florida Slave Trade,"
Florida Historical Quarterly: Vol. 49
, Article 4.
Available at: https://stars.library.ucf.edu/fhq/vol49/iss4/4