A large collection of science-fiction convention programmes have recently arrived on Archive.org. Among these is the Tricon 1966 (a Worldcon, Ohio) convention booklet. This features a cover by Kelly Freas depicting Lovecraft’s first full-length biographer L. Sprague de Camp.
And another inside, an ink drawing by Joseph Wehrle.
And Progress Report 1 has a good photo, which I’ve enhanced a bit.
Incidentally, there’s a new blog dedicated to de Camp and his fiction, at Sprague de Camp Fan.