“Ah! you are piecing it together now. I hear that she is about to marry the young Duke of Lomond, who might almost be her son. His Grace’s ma might overlook the age, but a big scandal would be a different matter, so it is imperative⁠—Ah! here we are.”

It was one of the finest corner-houses of the West End. A machine-like footman took up our cards and returned with word that the lady was not at home. “Then we shall wait until she is,” said Holmes cheerfully.

The machine broke down.

“Not at home means not at home to you ,” said the footman.

“Good,” Holmes answered. “That means that we shall not have to wait. Kindly give this note to your mistress.”

He scribbled three or four words upon a sheet of his notebook, folded it, and handed it to the man.

“What did you say, Holmes?” I asked.