Issue #16 of CASTLE OF FRANKENSTEIN magazine published in 1971 included the first part of an interview with Robert Bloch. The interviewer was CREATURE FEATURES host, John Stanley. Stanley is also well known for his series of move/video review compendiums called the CREATURE FEATURES MOVIE GUIDE.
Interestingly, Bloch mentions that he is "very" familiar with Calvin Beck's magazine. He goes on to talk about his late friend, Boris Karloff, and his career.