ALS. Papers consist mostly of letters written to Torrey by professional colleagues, botanists and geologists involved in exploration and surveyor expeditions. Notable correspondents include Louis Agassiz, A.D. Bache, Spencer Fullerton Baird, George Bentham, Jacob Bigelow, James Dwight Dana, William Darlington, Amos Eaton, Ebenezer Emmons, Asa Gray, A. Guyot, Robert Hare, Joseph Henry, Edward Hitchcock, John Lindley, Josiah Clark Nott, C.S. Rafinesque, and John White Webster. A complete list of correspondents is available.

ALS. Papers consist mostly of letters written to Torrey by professional colleagues, botanists and geologists involved in exploration and surveyor expeditions. Notable correspondents include Louis Agassiz, A.D. Bache, Spencer Fullerton Baird, George Bentham, Jacob Bigelow, James Dwight Dana, William Darlington, Amos Eaton, Ebenezer Emmons, Asa Gray, A. Guyot, Robert Hare, Joseph Henry, Edward Hitchcock, John Lindley, Josiah Clark Nott, C.S. Rafinesque, and John White Webster. A complete list of correspondents is available.