March 31, 1847. C.F. Johnson to Ezra Cornell, discussing Eastern telegraph project and use of visual telegraph signals over long distances. April 10, 1847. Ezra Cornell to Alonzo B. Cornell: "?have a book in reach for every leisure moment." April 17, 1847. Telegraph messages to and from Ezra Cornell. April 19, 1847. M.B. Wood to Ezra Cornell discussing family news and possible employment when telegraph is constructed in Michigan. Topics: Telegraph business correspondence: subscription sales in Michigan, Chicago and Wisconsin, establishment of new lines, rates, routes; Erie & Michigan Telegraph Company.; visual telegraph. Personal names: Tillotson, D.T.; Speed, J.J.; Norton, John W.; Smith, F.O.J.; Johnson, C.F.; Beebe, Jeremiah S.; Cornell, Alonzo B.; Cornell, E.B.; Wood, M.B. Geography: Ithaca, N.Y.; New York City