Helvill, Lt.-Gen2009-07-282009-07-282009-07-28http://hdl.handle.net/10222/12129One letter , two pages.One letter to James Dinwiddie from Lt. Gen. Helvill dated July 11, 1790.enPlantaHelvillJames DinwiddieMuseumChannelLt. Gen Helvill1790RomanGreekMechanitianMathematicianAntiquitiesText