I purchased August Derleth’s stamp collection from April Derleth in 2010, and subsequently purchased Augie’s collection of FDC’s from David Rajchel the following year mounted in two blue binders. There was a box of stamps on paper, and envelopes and stationary dating right back to the 1930s. Here is but one of the covers. I speculate that this is the envelope that August received which notified him that he had won the prize, or perhaps it contained the check for $2,500 (Alison WIlson Bibliography). in any case August spent the money to bind his extensive collection of Comic Strips that he had meticulously collected since he was chilld. This collection now resides in the State Historical Society in Madison. Interesting! How a single envelope can tell a story. I am confident that Augie opened it, emptied the contents, and threw it into the box of philatelic odds and ends, only to be removed some 70 years later.