What evidence was there to suggest there was a population concern in Haiti?

For starters in 1779 there were 7,055 people of color in Saint-Domingue. A mere eight years later there were almost 20,000. This means that in less than a decade the population of POC had more than doubled. An astonishing rate of growth. Compare that to France’s population that barely grew by one-ninth over a 72 year period. There was little indication that this population would slow down due to unrestrained lechery of so many white people in the area. Coupled with rising tensions amongst slaves and freed blacks there was an obvious concern within French minds that an uprising was very much possible. It is rather ironic that the population that the French tried to keep down grew in such great numbers due to their own sexual actions.