On the afternoon of July 27, Maximilian called upon Dr. Saynisch to inspect his collection of scientific books and related natural history specimens, for the most part locally obtained. Later, accompanied by Bodmer, they took a stroll along the Lehigh River past Moncasa Creek. Bodmer's softly washed watercolor of the scenery along the Lehigh appears to have been scrubbed in spots and remains in an unfinished state.

Maximilian left New York on July 16 and took passage by steamer to Amboy, New Jersey. Near Amboy he boarded a stagecoach for Philadelphia, and on July 18 he traveled to neighboring Bordentown, New Jersey. On July 19 he visited the va-cant estate of Joseph Bonaparte, Napoleon's older brother. On the evening of July 22, Bodmer arrived at the Bordentown tavern where Maximilian was staying. The next day on a walking tour with the Prince along the Delaware, he made two watercolor studies of the landscape in the vicinity of the Bonaparte estate.