A red square of light had sprung out of the darkness. In the middle of it was the black figure of the secretary, his head advanced, peering out into the night. It was evident that he was expecting someone. Then at last there were steps in the road, a second figure was visible for an instant against the light, the door shut, and all was black once more. Five minutes later a lamp was lit in a room upon the first floor.

“It seems to be a curious class of custom that is done by the Fighting Cock,” said Holmes.

“The bar is on the other side.”

“Quite so. These are what one may call the private guests. Now, what in the world is Mr. James Wilder doing in that den at this hour of night, and who is the companion who comes to meet him there? Come, Watson, we must really take a risk and try to investigate this a little more closely.”