"It is said of negroes, that their brain is blackish, and the glandula pinealis wholly black; a remark of which the Cartesian, with his audience-hall of perception, might make much."
An Essay on the Treatment and Conversion of African Slaves in the British Sugar Colonies
James Ramsay, <u>An Essay on the Treatment and Conversion of African Slaves in the British Sugar Colonies</u> (London: printed and sold by James Phillips, 1784). &lt;<a href="http://books.google.com/books?id=CMINAAAAQAAJ">Link to Google Books</a>&gt;