He's the earliest player I can think of who was a very strict "one per" if you wrote him an autograph request. "I don't like to be traded."
This explains why his autograph is seen in far lesser quantity than the rest of his Glory of Their Times bookmates, all of whom were inundated with requests after the book's release. Goslin didn't sign much himself due to poor health, leaving his female family members to ghost sign 99% of that latter-day material. And, of course, Jimmy Austin passed shortly beforehand, thereby missing the deluge of requests.
In case anybody wondered if greedy autograph collectors were a newer phenomenon, I can think of at least a couple of 1960's collectors/dealers who would routinely mail 50 or 100 index cards to be signed
all at once, with no compensation to the player, and even had the gall to do so on a repeated basis. Then, to prove they weren't at all embarrassed by this, they would sell index cards with notes penned by players, questioning why they would need so many (AKA the ridiculously classy reply) or "My autograph isn't for selling" (AKA the player predicting the future of the hobby) or "I never want to hear from you again" (the logical, angry reply). I heard one story about one of these collectors setting up at shows into the late 1980s with 6 inch thick stacks of index cards of the same player, including Eddie Cicotte. Wonder where all those Cicottes drifted off to. He's not a huge challenge, but also not toilet paper common.