I believe he was also the person who first got P.D. Ouspensky published in English.

Edit: yes - he produced the first English translation of Ouspensky as early as 1919. Ouspensky was a refugee in Constantinople, had no idea the translation had come out, and Bradgon had no idea where he was. Eventually they found him and sent him a royalty check and this eventually led to Ouspensky's emigrating to England.

It’s funny, I found the images somehow quite unsettling. Maybe it’s just that they look like drawings associated with magical work. Which, reading the comments here, they might be.