Collections : [University of Michigan William L. Clements Library]

This cypher book, by Theophilus Norris of Epping, New Hampshire, contains mathematical rules, examples, and exercises. Entries also relate to practical uses, including surveying, weights and measures, and compound interest. Several handwriting exercises are also present, as well as brief genealogical notes relating to Elizabeth Brier and Elizabeth Norris.

The William Yardley Mathematics and Surveying Exercise Book contains solved geometric, trigonometric, and surveying exercises, including practical problems and illustrated examples that feature drawings of buildings, animals, and landscape elements.

The William Yardley Mathematics and Surveying Exercise Book contains solved geometric, trigonometric, and surveying exercises, including practical problems and illustrated examples that feature drawings of buildings, animals, and landscape elements. Calligraphic lettering appears throughout.

One letter written by Harry [Crockett?] to his mother, Mrs. L. F. Crockett, from Portland, Maine, on October 8, 1903, is laid into the volume. Written on John W. Perkins Company, Wholesale Druggists, illustrated stationery, the letter comments on family matters, business, and deaths of acquaintances, including one gentleman who was killed by an electric car.