Compelling Civil War-era letter, dated July 8 (likely 1863), details wartime financial transactions involving the exchange of Confederate currency in Missouri, associated with the McFarlane family and Knapp's Pennsylvania Artillery network. The single-sheet document measures approximately 10 in. H x 7 3/4 in. W overall, with condition disclosures including ink fading with partial legibility, edge wear, and age-appropriate paper toning consistent with antique wartime correspondence.