Spanish scholar Fernández-Armesto tells us that the striking feature of the Canarian industry was its use of both free and enslaved labor, a combination that resembled more the pioneering mixed-labor systems of a later era: the seventeenth-century British and French Caribbean plantations, on which enslaved and indentured laborers would work alongside one another.
The use of a combination labor system in these regions during the 17th - 19 th Centuries is well known - So learning that this type of System was used @ the advent of the Carribean slave system is not surprising, but quite interesting.

