The steps passed along the path on the other side of the wall under which I crouched.

Looking over, I saw the naturalist pause at the door of an out-house in the corner of the orchard.

A key turned in a lock, and as he passed in there was a curious scuffling noise from within.

He was only a minute or so inside, and then I heard the key turn once more and he passed me and reentered the house.

I saw him rejoin his guest, and I crept quietly back to where my companions were waiting to tell them what I had seen.
"You say, Watson, that the lady is not there ?" Holmes asked when I had finished my report.
"No." "Where can she be, then, since there is no light in any other room except the kitchen ?" "I cannot think where she is." I have said that over the great Grimpen Mire there hung a dense, white fog.