Book of Baron Gruner

“It‘s a book he has — a brown leather book with a lock, and his arms in gold on the outside." (Kitty Winter)
“I tell you, Mr. Holmes, this man collects women, and takes a pride in his collection, as some men collect moths or butterflies. He had it all in that book. Snapshot photographs, names, details, everything about them. It was a beastly book — a book no man, even if he had come from the gutter, could have put together."(Kitty Winter)

“Here is the book the woman talked of. If this will not break off the marriage, nothing ever could. But it will, Watson. It must. No self-respecting woman could stand it.”
“It is his love diary?”
“Or his lust diary. Call it what you will." (Sherlock Holmes)