The Blurb On The Back:
Many people in that ghostly place beside the moulins heard the murderer’s step in the hallways at night, and saw the white marble hand run along window-ledges like a spider, but nobody saw the murderer’s face. There were four clues written in the yellow book, and any member of the household might have been guilty.
Rossiter – who has credentials from Scotland Yard, but cannot keep a job anywhere – solves the Quayle murders by means of an empty paint-bucket, a view from a window, and an absent-minded drawing in a book.
The Review (Cut For Spoilers):