Thurston the Magician:

I found this in one of my gran’s scrapbooks based around World War One.  He came to Kingston in 1917- four years into the war. According to my Web research, Thurston was the largest magic act in his time.  He was famous for his work with playing cards.  When my gran saw his act, he would have been 48 years old- he died in 1936.  His wife wrote a book about him:.  “My Magic Husband: Howard Thurston Unmasked. “

Why the devils on his shoulders?