“Because, sir, when I took him his coffee just now, as usual, I knocked four times and got no answer. And his door’s locked; it’s not his habit to lock his door when he’s at home.”

Atkins is one of the staff of servants attached to the Mansions, whose particular office it is to wait on the occupants of chambers on the first floor: a discreet man, who has a pretty intimate knowledge of the manners and customs of those on whom he attends.

“Mr. Lawrence was in his rooms last night. I was with him till rather late, and I believe he had a visitor after I had left.”

This I said remembering what Turner had told me about his brother coming down the stairs, with the parcel in his arms.

“I think he must be out now—at least, I can’t make him hear. And the door’s locked; I never knew him have the door locked when he was in.”

“Perhaps he’s ill,” I suggested. “I’ll slip along the balcony and see. You wait here till I come back.”

I do not know what induced me to make such a proposition, except that I was struck by the man’s words, and impelled by a sudden impulse. On every floor a balcony runs right round the building. Lawrence and I had often made use of it to reach each other’s rooms—his are the first set round the corner. I put on a pair of slippers and a dressing-gown, and started.

It was a chilly morning, with a touch of fog in the air, and it had been raining. I made what haste I could. The window of Lawrence’s dining-room opened directly I turned the handle. I went inside, and I saw what I then instantly and clearly realised I had all along felt sure that I should see. I sprang back upon the balcony. Atkins was looking out of my window. I called to him.

“Come here! Quick! There’s something wrong!”

He came running to me.