This letter, incidentally, describes the origins of a lifelong animosity between Arnold and Frank P. Lahm, his former French instructor at West Point and an aviation pioneer. Colonel Glassford, the commander, and Captain Lahm, the executive officer, were responsible for the delayed desert search as well as the stinging efficiency reports. It was not until much later in life that Arnold and Lahm ever publicly reconciled their differences resulting from the incident. Privately, on both sides the animosity remained.25