"That is the end of my adventure. What I have to tell you now is what
I learned from the police.

"At the station-house to which the man guided me I related what you
have just heard. I told them that the house they must at once find
was one set back from the street within a radius of two hundred yards
from the Knightsbridge Barracks, that within fifty yards of it
someone was giving a dance to the music of a Hungarian band, and that
the railings before it were as high as a man's waist and filed to a
point. With that to work upon, twenty men were at once ordered out
into the fog to search for the house, and Inspector Lyle himself was
despatched to the home of Lord Edam, Chetney's father, with a warrant
for Lord Arthur's arrest. I was thanked and dismissed on my own
recognizance.

"This morning, Inspector Lyle called on me, and from him I learned
the police theory of the scene I have just described.

"Apparently, I had wandered very far in the fog, for up to noon to-
day the house had not been found, nor had they been able to arrest
Lord Arthur. He did not return to his father's house last night, and
there is no trace of him; but from what the police knew of the past
lives of the people I found in that lost house, they have evolved a
theory, and their theory is that the murders were committed by Lord
Arthur.

"The infatuation of his elder brother, Lord Chetney, for a Russian
princess, so Inspector Lyle tells me, is well known to everyone.
About two years ago the Princess Zichy, as she calls herself, and he
were constantly together, and Chetney informed his friends that they