"I can see no other way out of it. And yet I would have trusted
him as I trust myself."

"At what hour was the office closed on Monday?"

"At five."

"Did you close it?"

"I am always the last man out."

"Where were the plans?"

"In that safe. I put them there myself."

"Is there no watchman to the building?"

"There is, but he has other departments to look after as well.
He is an old soldier and a most trustworthy man. He saw nothing
that evening. Of course the fog was very thick."

"Suppose that Cadogan West wished to make his way into the
building after hours; he would need three keys, would he not,
before the could reach the papers?"

"Yes, he would. The key of the outer door, the key of the
office, and the key of the safe."

"Only Sir James Walter and you had those keys?"