Toward the end of his life, it became somewhat common practice to post a picture of his door. It was an otherwise unremarkable thing, with a mail slot and a metal plate at the bottom. Up top, a large plate read simply, “S. Ditko.” Most wouldn’t venture beyond that, respectful of not disturbing the legendary cartoonist who’d become something akin to a comic book version of J.D Salinger, or maybe Thomas Pynchon.