These are the original sketches used for the engravings in Day's 1843 publication, "Historical Collections of the State of Pennsylvania" (Philadelphia). They are finely detailed renderings of public and private structures and landscape throughout Pennsylvania. Accompanying these sketches are 150 pages of photocopied letters of Day, from originals at Yale University. These were used by Smith in his book.

A published first edition, 1837, of Jean Baptiste Gaspard Roux de Rochelle's History of the United States of America, in French, with a companion volume of original sketches used for the 96 engraved plates. Sketches are of American scenes and history, some apparently original, others after de Bry and other artists, all used in Roux de rochelle's book.