“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 he 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?”
“I had no keys of the doors—only of the safe.”
“Was Sir James a man who was orderly in his habits?”
“Yes, I think he was. I know that so far as those three keys are concerned he kept them on the same ring. I have often seen them there.”
“And that ring went with him to London?”
“He said so.”
“And your key never left your possession?”
“Never.”
“Then West, if he is the culprit, must have had a duplicate. And yet none was found upon his body. One other point: if a clerk in this office desired to sell the plans, would it not be
