The letter is handwritten by Houdini who is pitching his act to a Mr. Hixon. If anyone has any information on Hixon, who may have been part of a firm called "Hixon & Wallen", I'd love to hear more. The content is phenomenal, probably the best early Houdini letter I've ever read. You might recall I shared a page from this letter in this post.
Congrats to the winner of this incredible early Houdini treasure.