We returned to the Manor, and Seal, refreshed by his lunch, seized a crowbar and wielding it with his great strength announced himself ready to assist us.

Like ourselves, he felt certain that, the treasure being hidden somewhere in that house, diligent search would have its reward. So he started on his own account tapping walls and investigating loose boards and hollow wainscotting.

We had seen no more of Bennett. He had come to the Plough probably with the object of ascertaining who we were, and had departed as quietly as he had come. Indeed, we should have been in ignorance of his visit had it not been that the skipper had recognized his voice. Job Seal had a very quick ear. He had told me long ago on board the Thrush that if he heard a man’s voice once he could recognize it again years afterwards. Sometimes partial blindness goes with that faculty, but not so in Seal’s case. No man had quicker eye or ear.

After half an hour’s search the skipper hit upon a likely spot which we had overlooked. At one end of the corridor, which upstairs ran the whole length of the house, was a small diamond-paned window, while at the other was a blank wall. The latter, when tapped, gave forth a hollow sound. There was a second spot of which we had also suspicion, namely, at the side of the fireplace in the modernized dining-room below.

Upon the latter we commenced first, all three of us working with a will. The afternoon was hot, therefore Seal threw off his coat and vest, rolled up his sleeves, and, blowing like a walrus, wielded the hammer necessary to drive the chisel into the wall.

Before long we had broken into the hollow, but again only disappointment awaited us. It was merely one of those little long cupboards which are so often seen beside the fireplaces in old houses. Upon the shelf within was plenty of dust, but only one object, a well-preserved halfpenny bearing the effigy of King Charles II.

“That’s for luck!” Seal cried humorously. “Let’s try upstairs, lads.”

So up we went, all three of us, and attacked the hollow place in that outer wall. The task was not so easy as that we had just concluded, for it seemed that only a small portion of the wall had been filled with plaster, the rest being very hard concrete, which we had to chip out laboriously with hammer and chisel.

The skipper was, however, enthusiastic in his new sphere. From navigating the Thrush he had turned housebreaker, and the fact that the treasure might be there concealed added a keen zest to the work of investigation. He worked, puffing and blowing, until the perspiration rolled off his great furrowed face. The part he had attacked was a particularly hard piece of concrete, which he was painfully chipping out. The plaster we had already removed disclosed a sheet of rusty iron, probably placed over a door, and its discovery had excited the skipper greatly. He expressed himself confident that we were on the verge of a discovery. And so we were.

The dust we raised was suffocating, while the chips of concrete flying in all directions proved a source of considerable danger to one’s eyes. A piece went into Reilly’s left eye, but we quickly dislodged it, and we continued to work on, eager to ascertain what was concealed behind that iron-cased door.

The previous door we had opened had been a labour in vain, but the iron upon this one had raised our hopes, and we all worked with a will, cutting out of the wall a piece nearly four feet square.

Seal with our long crowbar attacked the iron itself. When he struck it the hollow sound was like an explosion.

“There’s a room in here, I’m sure!” cried the skipper.

Then, while we continued, he set to work with the measuring tape, taking the distance from the door of the room to the wall we were attacking, and afterwards measuring inside the room from the door to the end wall. He found a considerable difference in the measurements, by which his excitement was increased.

We worked on without breathing space, for the eager anticipation was contagious. Yet we were compelled to progress by slow degrees and to chip away bit by bit of that hard concrete which they knew how to make so well centuries ago. It was almost as durable as stone itself.

At last we had cut it all away, and the dark iron-cased door stood revealed to us, looking like a modern fire-proof safe, only that it was not green and had no brass handle.

“Je-rusalem!” exclaimed the skipper, “I really believe this is the actual place! Look how carefully it’s been concealed! And the iron door, too. Let’s have it open, lads, if we have to pull down the bloomin’ house to get at it. We’ll get the best of Bennett and those murderous swabs yet!”

Again with his long crowbar he attacked the door, but it was unyielding. Gradually, however, Reilly, working more slowly and carefully, was enabled to wedge his chisel between the iron and the stonework. Then, after some difficulty, the skipper’s long bar was wedged in the place, and all three of us bore heavily upon it.

Once, twice, thrice we bore down, Seal giving us a sailor’s ahoy, and all bearing together.

At last and of a sudden with a terrific wrench the bolts gave way, and the door flew back with a crash and a cloud of dust, disclosing a small room which had been walled up for centuries. The old house, indeed, seemed full of secret chambers.

Reilly lit the hurricane lamp and handed it to me, for I was the first to enter.

The moment I crossed the threshold into the dark little place, no bigger than a good-sized cupboard, I drew back in horror.

On the floor in the thick dust lay a human skeleton!

“What’s the matter, doctor?” inquired the captain, entering quickly after me.

“Look!” I cried. “Somebody has been walled up here! Look at those bones.”

Seal glanced down to the corner I indicated, and the truth was at once revealed to him. Instead of treasure concealed there, we saw evidence of what was probably some long-forgotten crime.

Reilly was beside me in an instant, but there was hardly room for three of us in the narrow place. I bent down and turned over the bones to examine them more closely. The skeleton was doubled up, as though death had taken place from hunger rather than from want of air.

As I held the light something sparkled, and bending I saw that upon the finger-bones stretched in the dust there still remained three splendid rings. These and the size of the skull and certain of the other bones quickly told me that the person immured there had been a woman.

The three rings I took in my hand and examined them out in the daylight. They were dull and tarnished, bu............