Gygax himself went on to write two modules adapting Alice in Wonderland for AD&D in 1983: EX1 - Dungeonland and EX2 - The Land Beyond the Magic Mirror. I wonder if he read this article.
Had to laugh at the omission of that particular letter-writer's name. That's https://en.wikipedia.org/wiki/Jennell_Jaquays , a fantastic artist and writer who wrote created two of the best D&D modules of all time in Dark Tower and Caverns of Thracia. She later joined TSR in writing, editing, and...
https://www.facebook.com/groups/RPGAuctions is the actual auction group. if you don't want to ebay, i'd fully suggest this place. you'll get a good return on your collection from people who care about the game and know what things are worth