“ Mr. John Hector McFarlane?” said Lestrade.

Our unfortunate client rose with a ghastly face.

“I arrest you for the wilful murder of Mr. Jonas Oldacre, of Lower Norwood.”

McFarlane turned to us with a gesture of despair, and sank into his chair once more like one who is crushed.

“One moment, Lestrade,” said Holmes. “Half an hour more or less can make no difference to you, and the gentleman was about to give us an account of this very interesting affair, which might aid us in clearing it up.”

“I think there will be no difficulty in clearing it up,” said Lestrade, grimly.

“None the less, with your permission, I should be much interested to hear his account.”