TY - GEN ED - United States. ED - United States. TI - United States. Post Office Dept. records, KW - Brown, E. F. KW - Granger, Gideon, KW - Habersham, Joseph, KW - Osgood, Samuel, KW - Pickering, Timothy, KW - Cavetown Post Office (Cavetown, Md.) KW - Hamilton Post Office (Hamilton, Ohio) KW - United States KW - Postmaster General KW - Postal service KW - Maryland KW - Cavetown KW - Ohio KW - Hamilton KW - History N1 - Open to research N2 - Handwritten transcript of a letterbook of (1789 November 28-1805 March 15) containing copies of letters by postmasters general Gideon Granger, Joseph Habersham, Samuel Osgood, and Timothy Pickering; chart (1807) made by Gideon Granger; accounts (1804-1805, 1807) for the post office at Hamilton, Ohio; record book (1899 April 11-1906 September 25) of the post office at Cavetown, Md.; and essay (1912) entitled, Annals of the Post Office Department, 1607-1775, by E.F. Brown ER -