Is this thing still on? Okay, I know we're past our date, but to answer Joan, it's just one hunch, that Edwin Drood's father would be alive. Dickens certainly has other characters in his novels who were thought to be dead and turn up alive, so that would be no sweat for him. The mention of Edwin Drood's father is pretty pointed, and there's no follow-up... maybe it's a throwaway line, but I don't think so. I think having young Drood really dead and Drood's father alive could have been one way to go. I hadn't thought of that connected with Datchery, but I like the idea!
Now you see why I got caught up in the Mystery!