Just got my players into the Dracula Dossier campaign using The Harker Intrusion as the entry vector. It ended with them getting a copy of the dossier itself. They didn't follow up on the Gibraltar clues, but I think they're likely to do so in the next session. I'd like for them to find a copy of the E-Squadron briefing, but I'm leery of letting them know about HMS Proserpine too soon, because that's a pretty big node, and they're just beginning to learn about the existence of vampires and of Edom. They're likely to latch onto the name as a solid clue they can research.
Has anyone given this one out early in the campaign, and if so, what do you think of the HMS Proserpine issue?