“Sarasate plays at the St. James’s Hall this afternoon,” he remarked. “What do you think, Watson? Could your patients spare you for a few hours?”

“I have nothing to do today. My practice is never very absorbing.”

“Then put on your hat and come. I am going through the City first, and we can have some lunch on the way. I observe that there is a good deal of German music on the programme, which is rather more to my taste than Italian or French. It is introspective, and I want to introspect. Come along!”