His results were published in three volumes between 1839 and 1849: the Crania Americana, An Inquiry into the Distinctive Characteristics of the Aboriginal Race of America and Crania Aegyptiaca.
Mortons resultater blev udgivet i tre bind mellem 1839 og 1849: I Crania Americana, An Inquiry into the Distinctive Characteristics of the Aboriginal Race of America og Crania Aegyptiaca.