his own account, corroborated only by the word of his wife, he was at home the whole of Monday evening after office hours, and his key has never left the watch-chain upon which it hangs.”
“Tell us about Cadogan West.”
“He has been ten years in the Service, and has done good work. He has the reputation of being hot-headed and impetuous, but a straight, honest man. We have nothing against him. He was next Sidney Johnson in the office. His duties brought him into daily, personal contact with the plans. No one else had the handling of them.”
“Who locked the plans up that night?”
“Mr. Sidney Johnson, the senior clerk.”
“Well, it is surely perfectly clear who took them away. They are actually found upon the person of this junior clerk, Cadogan West. That seems final, does it not?”
“It does, Sherlock, and yet it leaves so much unexplained. In the first place, why did he take them?”
“I presume they were of value?”
“He could have got several thousands for them very easily.”
“Can you suggest any possible motive for taking the papers to London except to sell them?”
“No, I cannot.”
