O.R. Chap. XXXVI Jackson Campaign page 541
July 29,1863.
Report of Ordnance and Ordnance Stores captured at Jackson, Miss.
"Turned over to assistant quartermaster for transportation: 621 muskets and one 2 inch bronze rifled gun (breech-loading)."
Here is another rifled breech-loader in the area of Raymond, although clearly not a Whitworth.
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David Upton