Crania Americana; or, A comparative view of the skulls of various aboriginal nations of North and South America. To which is prefixed an essay on the varieties of the human species.

In his day Morton was the most eminent craniologist in the United States. He had a collection of nearly 1,000 skulls. In this work, which described both modern and fossil skulls, Morton described fractures and anthropogenic deformations. Digital facsimile from the Internet Archive at this link.