“Watson,” said he, “I have some recollection that you go armed upon these excursions of ours.”

It was as well for him that I did so, for he took little care for his own safety when his mind was once absorbed by a problem so that more than once my revolver had been a good friend in need. I reminded him of the fact.

“Yes, yes, I am a little absentminded in such matters. But have you your revolver on you?”

I produced it from my hip-pocket, a short, handy, but very serviceable little weapon. He undid the catch, shook out the cartridges, and examined it with care.

“It’s heavy⁠—remarkably heavy,” said he.

“Yes, it is a solid bit of work.”

He mused over it for a minute.

“Do you know, Watson,” said he, “I believe your revolver is going to have a very intimate connection with the mystery which we are investigating.”