Based on a famous "gag" photo taken on the set of FRANKENSTEIN MEETS THE WOLF MAN, it jokingly refers to the alleged combative relationship between Lon Jr. and Pierce. It still brings a smile to my face...

Oliver Reed from CURSE OF THE WEREWOLF, sketched with charcoal pencil
Lon Chaney Jr. and Elena Verdugo from HOUSE OF FRANKENSTEIN, graphite pencil.
And Chaney again, this time in simple pen and ink.
Even an artist who is pure in heart...