Is this the only evidence?

I don't know about any of you but I love little things like the above signature. It made it a bit more real for my young mind when I saw stuff like this. Granted, I have come to think it would have been cooler and more sensible to have signed with a mark or used a wax seal impressed with a signet ring. Still, I understand the need to generate excitement and the pace that the magazines were being produced dictated what was being included in the pulps. What a time to have been a kid.