"There you are wrong, because I am going to convince you to the
contrary. You may smile and shake your head, but before an hour has
passed I am going to convince you beyond all question that you were
never inside No. 219."

"Brave words," David muttered. "Still, an hour is not a long time to
wait."

"No. But you must enlighten me if I am to assist you. I am profoundly
interested. You come to the house of my friend on a desperate errand.
Miss Gates is a perfect stranger to you, and yet the mere discovery of
your identity fills her with the most painful agitation. Therefore,
though you have never been in 219 before, you are pretty certain, and I
am pretty certain, that Ruth Gates knows a deal about the thing that is
touching you. On the contrary, I know nothing on that head. Won't you let
me into the secret?"

"I'll tell you part," Steel replied. "And I'll put it pithily. For mere
argument we assume that I am selected to assist a damsel in distress who
lives at No. 219, Brunswick Square. We will assume that the conversation
leading up to the flattering selection took place over the telephone. As
a matter of fact, it did take place over the telephone. The thing was
involved with so much secrecy that I naturally hesitated. I was offered
L1,000 for my services; also I was reminded by my unseen messenger that I
was in dire need of that money."

"And were you?"

"My dear fellow, I don't fancy that I should have hesitated at burglary
to get it. And all I had to do was to meet a lady secretly in the dead of