Dr Walker tries the drawers, but finds only the usual detritus that ends up in them - pens, blank notepaper, elastic bands, that sort of thing. Certainly no books that look like Henslowe had written them. He then examines the camera, but finds that there is no film within; if any photos were taken using the camera, they have been developed.
Lillian peruses the bookshelves, meanwhile, noting that there are sizable collections of books on a variety of subjects, including archaeology, anthropology, business, finance, art, art history, and the occult.
One book in particular stands out:
Communion Rites of Victorian Death Cults, and whose author is Francis J. Hickering. As Lillian picks up the book to investigate further, a slip of paper falls from within the inside front leaf - no, not a piece of paper, a photograph.
It clearly shows the reverse of the house you're currently in, with a faintly scratched "#1" on it, and on the back, a list of names.