CHAPTER 7"Saunderson's flat is on the ground floor," the inspector said as he and Harbord paused before the Polchester Mansions—a new palatial block in the immediate neighbourhood of Piccadilly. "It has been locked up and the old housekeeper sent away, and Venables has been on guard ever since last Friday, when we were summoned to Holford. I fancy we shall find the clue to the mystery here."
"If there is one," Harbord interposed.
Stoddart raised his eyebrows.
"Certainly there is one. It is scarcely like you to be so pessimistic, Alfred."
"I ought to have said if there is one that can be found," Harbord corrected. "We are up against a criminal who knows how to hide his traces. And really Saunderson might have been trying his best to help him."
"Or her," the inspector interjected.
"Or
