“I don’t know, Mr. Holmes. There may have been only one. I have not noticed them for months.”

“One dumb-bell——” Holmes said seriously; but his remarks were interrupted by a sharp knock at the door.

A tall, sunburned, capable-looking, clean-shaved man looked in at us. I had no difficulty in guessing that it was the Cecil Barker of whom I had heard. His masterful eyes travelled quickly with a questioning glance from face to face.

“Sorry to interrupt your consultation,” said he, “but you should hear the latest news.”

“An arrest?”

“No such luck. But they’ve found his bicycle. The fellow left his bicycle behind him. Come and have a look. It is within a hundred yards of the hall door.”

We found three or four grooms and idlers standing in the drive inspecting a bicycle which had been drawn out from a clump of evergreens in which it had been concealed. It was a well used Rudge-Whitworth, splashed as from a considerable journey. There was a saddlebag with spanner and oilcan, but no clue as to the owner.

“It would be a grand help to the police,” said the inspector, “if these things were numbered and registered. But we must be thankful for what we’ve got. If we can’t find where he went to, at least we are likely to get where he came from. But what in the name of all that is wonderful made the fellow leave it behind? And how in the world has he got away without it? We don’t seem to get a gleam of light in the case, Mr. Holmes.”

“Don’t we?” my friend answered thoughtfully. “I wonder!”