“Chut, don’t let’s come to any personalities until we have more data; we shall be following wandering fires.”
Sinclair was not to be silenced.
“What do you make of the behaviour of Lewis when I asked him to come with me?” he said.
“I don’t pretend to make anything of it. It may have the most natural of explanations.”
“I have never known him to behave like that before,” he persisted. Collins ignored him.
“We have five things to bear in mind, or shall I put it we have five questions to answer:
“Who sent the letter to the Central News, and for what object?
“Who called us up on the telephone, and why?
“Who was the man who called at three?
“How did the murderer get in, and how did he escape?