"And why did you use this revolting expression?"

"What I meant was, sir, that I reckoned I knew what was at the bottom of all this."

"And were you right in this reckoning?"

A coy look came into Mullett's face.

"Yes, sir. You see, Mr. Finch's behaviour having aroused my curiosity, I took the liberty of following him one afternoon. I followed him to Seventy-Ninth Street, East, Mr. Beamish."

"And then?"

"He walked up and down outside one of those big houses there, and presently a young lady came out. Mr. Finch looked at her, and she passed by. Then Mr. Finch looked after her and sighed and came away. The next afternoon I again took the liberty of following him, and the same thing happened. Only this time the young lady was coming in from a ride in the Park. Mr. Finch looked at her, and she passed into the house. Mr. Finch then remained staring at the house for so long that I was obliged to go and leave him at it, having the dinner to prepare. And what I meant, sir, when I said that the duration of Mr. Finch's absence depended on the young lady, was that he stops longer when she comes in than when she goes out. He might be back at any minute, or he might not be back till dinner-time."

Hamilton Beamish frowned thoughtfully.

"I don't like this, Mullett."

"No, sir?"