“You say that she must have come back this way?”

“Yes, sir, there is no other.”

“On this strip of grass?”

“Certainly, Mr. Holmes.”

“Hum! It was a very remarkable performance⁠—very remarkable. Well, I think we have exhausted the path. Let us go farther. This garden door is usually kept open, I suppose? Then this visitor had nothing to do but to walk in. The idea of murder was not in her mind, or she would have provided herself with some sort of weapon, instead of having to pick this knife off the writing-table. She advanced along this corridor, leaving no traces upon the coconut matting. Then she found herself in this study. How long was she there? We have no means of judging.”