Académie Royale des Sciences (France), Paris, to John Collins Warren, 1829 August 31 Box 1, Folder 1 Bookmark Collection Context
Agassiz, Louis, Cambridge, Mass., to John Collins Warren, 1848 June 7 Box 1, Folder 30 Bookmark Collection Context
Barrett, Benjamin, 2 letters to John Collins Warren, 1825 September 1 and 1825 September Box 1, Folder 2 Bookmark Collection Context