There are certain positions in which a man may find himself where a measure of ignorance is a blessed thing.

Believe me, that if you understood, your difficulties would increase instead of diminish." I shrugged my shoulders.
"But between you and me at least, Colonel Ray," I said, "there is a plain issue.

You can explain the events of last night to me." "I will do that," he answered, "since you have asked it.

Briefly, then, I parted from you on the steps of my club at a few minutes past nine last night." "Yes!" "I saw from the moment we appeared that you were being watched.

I saw the man who was loitering on the pavement lean over to hear the address you gave to the cabman, and you were scarcely away before he was following you.