April 13, 1849. J.J. Speed's experiments and speculations concerning telegraph science. April 15, 1849. Jane Cornell to Ezra Cornell: "Mary has left of doctoring with a Botanic Doctor, and is taking Myres Sarsaparilla Dandelion & Wild-cherry extract?" Topics: Telegraph business correspondence: materials and supplies, finances, western lines, conflict with O'Reilly's lines, Erie & Michigan line. Personal names: Speed, J.J.; Cornell, Jane; Briggs, Amos; Cornell, E.S.; Cornell, John H. Geography: Detroit