They appeared all to have made considerable progress in reading for the time they had respectively been in the school, and most of them answered readily and well the questions of the catechism. They behaved very orderly, and showed a proper respect and ready obedience to the mistress, and seemed very attentive to, and a good deal affected by, a serious exhoration with which Mister Sturgeon concluded our visit. I was on the whole much pleased, and from what I then saw, have conceived a higher opinion of the natural capacities of the black race, than I had ever before entertained. Their apprehension seems as quick, their memory as strong, and their docility in every respect equal to that of white children.
Letter to Waring (17 December 1783), after visiting a school, as quoted in The First American: The Life and Times of Benjamin Franklin (March 2002), by H.W. Brands, p. 355.