Statistics for occurrence #1 of “Connecticut” in chapter 6, page 129 of George Bancroft, History of the United States from the Discovery of the American Continent, Vol. 4, 15th edition.:
...
Of persons of African lineage the home was chiefly determined by climate.
New Hampshire, Massachusetts, and Maine may have had three thousand negroes; Rhode Island, four thousand five hundred; Connecticut , three thousand five hundred; all New England, therefore, about eleven thousand.
New York alone had not far from eleven thousand;
...