November 9, 1846. Instructions to employee Curtis from Ezra Cornell on operation of telegraph wires: "Order must be obeyed right or wrong. It is the only way to preserve harmony in the working of the line." November 19, 1846. D.B. Cornell to Ezra Cornell: "I have had quite a notion lately of learning to write on the telegraph and should like your advice on the subject?for if there is anything to be made by it I should like to have my share." Topics: Telegraph business correspondence: technical matters, establishment of new lines (Detroit to Milwaukee). Personal names: Eddy, James; Speed, J.J.; Kendall, Amos; Faxton, Theodore; Cornell, D.B. Geography: Ithaca, N.Y.; New York City