appeared to Thorndyke worth noting. Then we went out by the side door and down the covered way into the yard at the back. The workshops were fastened with rusty padlocks that looked as if they had not been disturbed for months. The stables were empty and had been tentatively cleaned out, the coach-house was vacant, and presented no traces of recent use excepting a half-bald spoke-brush. We returned up the covered way and I was about to close the side door, which Thorndyke had left ajar, when he stopped me.
"We'll have another look at the hall before we go," said he; and, walking softly before me, he made his way to the front door, where, producing his lamp, he threw a beam of light into the letter-box.
"Any more letters?" I asked.
"Any more!" he repeated. "Look for yourself."
I stooped and peered through the grille into the lighted interior; and then I uttered an exclamation.
The box was empty.
Thorndyke regarded me with a grim smile. "We have been caught on the hop, Jervis, I suspect," said he.
"It is queer," I replied. "I didn't hear any sound of the opening or closing of the door; did you?"
"No; I didn't hear any sound; which makes me suspect that she did. She would have heard our voices and she is probably keeping a sharp look-out at this very moment. I wonder if she
