Though the following item is signed, it's undated, so I can't tell you exactly when it was written. What I can tell you is that in my orderly file folder of memos from that period, it was between a memo dated March 24, 1976 (from me to John David Warner with due dates for upcoming issues of Son of Satan) and one dated April 20, 1976 (from Sol Brodsky regarding Jim Shooter's ... well ... I'll let that be a post for another day).
Yet another souvenir from Marvel's revolving-door editor-in-chief position of the mid-'70s.
[Click on the scan several times to view at full size.]