July 27, 1854. Ezra Cornell to Alonzo B. Cornell from Detroit concerning underground telegraph, family news and health, and instructions to Ellen on the care of the children in Ezra and Mary Ann's absence. Topics: Telegraph business correspondence: finances, pipelayer and underground telegraph, office operations; Ezra Cornell's ill health and treatment. Personal names: Cornell, Alonzo B.; Cornell, Mary Ann; Cobb, Emory Geography: Detroit; Ithaca, N.Y.; Logansport, In.; Indiana