Channing Arnold, The American Egypt: A Record of Travel in Yucatan
“ For even if the aboriginal peoples of America could be assumed to be as strictly indigenous in their habitat as the negroid peoples are generally held to be in theirs, you have still to explain an isolated outburst of civilisation in Central America marking off an extraordinarily restricted area, comparatively speaking, from the vast continental expanses north and south. But the ethnical problems of the Negro and the American are not even so far analogous ”
