"I agree, pairs or trios would be best." He scans each of the clues the group has laid out on the table before them. "Do we speak to the Harvard professor by telephone, or should some of us make a trip to Boston? Otherwise, she wrote to Mr. Elias at his publishers. We should visit this 'Prospero House', perhaps first, and as a group - If he had his mail delivered there, we can assume they were friendly to him, and they may be helpful to us."
As to other clues, "The importer is here in New York. We may be able to discover the Dark Mistress's registry at the port, or perhaps the library. We have the murderers' license plate, assuming it wasn't a stolen car. We should also talk to the folklorist - Mr. Lemming, if the police will let us. If this is connceted with the Carlyle disappearance, speaking to those who knew or worked with him before his disappeanace might be helpful. Our other clues seem to send us rather far afield: London, Egypt, Shanghai. Can anyone think of other leads we have at this point?"