read the Negroes of Negroland - or at least the section on cannibalism Whites observed in Africa (page 21) - https://archive.org/details/negroesinnegrola00help

is it more likely many men saw such vile actions (including the founders when dealing with the Barbary Pirates) or that the book is made up - and if the negroes are at least nominally human, one must assume they are much closer to the default for the White man without culture than the man of today is (and recall that Haiti was founded by killing and eating the French and Mulattoes on their section of the Island)