When Vladimir Nabokov was asked whether he had read Franz Kafka’s The Trial before writing Invitation to a Beheading, Nabokov insisted that he had not. Having read Invitation to a Beheading, the basic premise is so similar—a man awaits execution for a crime that is never made clear—it is difficult to take his word for it. It doesn’t help that Lolita may have been intentionally or subconsciously plagiarized from a short story.
If I hadn’t had my own (possibly Jungian collective) subconscious plagiarism or influence, I would think it was fairly obvious that Nabokov had first read the trial. (Perhaps you have your own example of cryptomnesia?)