 It was one of the few distilled using the pot still method, and continued to do so until around 1913.During Prohibition, Old Fitzgerald was one of a select few to distill under government supervision for the national medicinal trade, it was soon after acquired by Pappy Van Winkle for $10,000 who then introduced the "Whisper of Wheat" to the original recipe.By substituting some wheat for the more traditional rye in the grain recipe, Old Fitzgerald presented a rounder, softer profile than other bourbons.