Theophilus Norris cypher book, ca. 1783-ca. 1795
1 volume
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.