"National Education Association of the United States. Committee on the Horace Mann Centennial." . . . . . . "Go forth and teach : an oration delivered before the authorities of the city of Boston, July 4, 1842" . . . "Go forth and teach; an oration delivered before the authorities of the city of Boston, July 4, 1842"@en . . . . "Go forth and teach an oration delivered before the authorities of the city of Boston, July 4, 1842" . "Go forth and teach an oration delivered before the authorities of the city of Boston, July 4, 1842"@en . . . "Tharp collection." . "Tharp collection."@en . . .