The others of the "indigenous" school have proved halfhearted and vague. If you insist upon their coming to the point and saying whence the builders really came, they try to parry your insistence by asking a question in their turn--"Whence came the African Negroes?" To this the correct reply, according to Professor E. Morse, is "From Africa, of course." "Originally?" "Yes, originally: they constitute the African or Negro sub-species of Man." This is a mode of arguing which is fundamentally unsound for the excellent reason that the cases of the African and American races are not analogous. 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; for, as all the world knows, the generally accepted theory as to the American race is that it must be ultimately referred to the Mongoloid division of mankind, and that the New World was in prehistoric times peopled from Asia. But if this view, supported as it is by a physical resemblance in some cases so remarkable as to quite stultify the suggestion of coincidence, were upset, you would still be confronted with the unanswerable question: If American architecture is of home-growth, why was it restricted to one very small area? For the proposition that it is indigenous almost demands the postulate that it evolved at such an early date in some form or other as to allow time for it to spread far into the north and south of the New World. If any deduction is possible from its singular localisation, it is surely that it was introduced from outside and at so comparatively recent a date before the arrival of the White race in the Americas as not to have permitted time for it to spread far.[12] Everything then points to the exotic nature of American architecture. Whence came its originators? Our postulates enable us to narrow the inquiry to Egypt, Japan, China, India, Ceylon, and the Malay Peninsula. Let us take these possibilities in this order.