This may be the earliest work incorporating anatomical images that was written in opposition to phrenology. Sewall, a physician from New England, was a founding member of the medical department at Columbian College (now George Washington University) in Washington D.C., where he had relocated after being convicted of body-snatching in Massachusetts. A vocal opponent of phrenology, Sewall laid out his objections based on two lectures delivered before the students of Columbian College in 1837. The work is illustrated with images of horizontal and vertical sections of the brain and skull, together with a diagram of the phrenological "organs" of the brain / mind. Digital facsimile from U.S. National Library of Medicine at this link.