The gun-room was dark and silent as a vault. In the deep recesses the armoured phantoms of dead and gone Herediths seemed to be watching the intruder with hidden eyes behind the bars of their tilting helmets and visored salades. The light of Colwyn's electric torch fell on the shell of a mighty warrior who stood with one steel gauntlet raised as though in readiness to defend the honour of his house. His initials, "P.H.," were engraved on his giant steel breast, and his steel heels flourished a pair of fearful spurs, with rowels like daggers. Standing by this giant was a tiny suit of armour, not more than three feet in height, which might have been worn by a child.

"A strange pair," murmured Colwyn, pausing a moment to glance at them. As he turned his light in their direction his eye was caught by an inscription cut in the stone above their heads, and he drew nearer and read that the large suit had been worn by the former Philip Heredith, "A True Knight of God." The smaller suit had been made for a dwarf attached to his house, who had followed his master through the Crusades, and fought gallantly by his side.

Colwyn turned away and flashed his light along the walls in search of the case of pistols. His torch glanced over the numerous trophies adorning the walls, lances, swords, daggers, steel head-pieces, bascinets, peaked morions—relics of a departed age of chivalry, when knights quarrelled prettily for ladies, and fighting was fair and open, before civilization had enriched warfare with the Christian attributes of gas-shells, liquid fire, and high explosives. Then the light fell on that which he was seeking—a dark oblong box, with brass corners, and a brass handle closing into the lid.

Colwyn lifted the case down from the embrasure in which it was placed, and carried it to the bagatelle table. A brief examination of the lock satisfied him that it was too complicated and strong to be picked or broken. It was curiously wrought in brass, of an intricate antique pattern which would have puzzled a modern locksmith. He turned the case over, and saw that the bottom had been mortised and screwed. The screws had been deeply countersunk, and were embedded in rust, but a few were loose with age. Colwyn unscrewed these loose ones with his pocket-knife, and then set about unloosening the others.

It was a tedious task, but Colwyn lightened it with the aid of a bottle of gun oil which he found in one of the presses. Some of the screws yielded immediately to that bland influence, and came out easily. Others remained fast in the intractable way of rusty screws, but Colwyn persevered, and by dint of oiling, coaxing, and unscrewing, finally had the satisfaction of seeing all the screws lying in a little greasy brown heap on the faded green cloth of the bagatelle table. The next thing was to lever off the bottom of the lid. That was not difficult, because the glue in the mortises had long since perished. Soon the bottom was lying on the table beside the screws, and the interior of the case revealed.

The pair of weapons which Colwyn lifted from the case were horse pistols of a period when countryfolk feared to ride abroad without some such protection against highwaymen. They were superior specimens of their type. They were beautifully made, rich in design and solid in form, with ebony stocks and chased silver mountings. The long barrels were damascened, and the carved handles terminated in flat steel butts which would have cracked the pate of any highwayman if the shot missed fire. As Colwyn anticipated, the pistols were muzzle-loaders. The cock, which laid over considerably, was in the curious form of a twisted snake. When the trigger was pulled the head of the snake fell on the nipple.

Colwyn examined them carefully. He first ascertained that they were unloaded by probing them with the ramrod which was attached to each by a steel hinge. Then he ran his finger round the inside of the muzzles to ascertain whether either pistol had been recently fired. One was clean, but from the muzzle of the other he withdrew a finger grimed with gunpowder. While he was doing this his other hand came in contact with something slightly uneven in the smooth metal surface of the butt. He turned the pistol over, and noticed a small inner circle in the flat steel. It was a small hinged lid, which hid a pocket in the handle. He raised the little lid with his finger-nail, and a shower of percussion caps fell on the bagatelle table. This contrivance for holding caps was not new to Colwyn. He had seen it in other old-fashioned muzzle-loaders.

Colwyn compared the caps which had dropped on the table with the one he had found upstairs. They were the same size. He tried the solitary cap on the nipple, and found that it fitted perfectly. As he did so, he saw something resembling a thread of yellow wool caught in the twisted steel of the hammer. It was a minute fragment, so small as to be hardly noticeable. Colwyn was quite unable to determine what it was, but its presence there puzzled him considerably, and he was at a loss to understand how it had got caught in the hammer of the pistol. It struck him that the thread might be khaki, and his mind reverted to his earlier discovery of the patch of khaki in the wood outside the moat-house.

It was with the hope of finding out whether this pistol had been lately used that Colwyn turned his attention to the velvet-lined interior of the case. The inside was divided into a large compartment for the pistols and several small lidded spaces. In one of these he found some shot, a box of percussion caps, and a powder-flask half-full of common gunpowder. Another space contained implements for cleaning the pistols. The contents of the next compartment puzzled him. There were some odd lengths of knotted string, and a coil of yellow tubular fabric, about the thickness of his little finger, some inches in length. Colwyn recognized it at once. It was the wick of a tinder-lighter, then being sold by thousands by English tobacconists to replace a war-time scarcity of matches, and greatly used by cigarette smokers.

The mystery of the presence of the wick in the pistol-case was not lessened because it enabled Colwyn to identify the tiny yellow fragment adhering to the cock of the pistol. He picked up the wick and observed that one end was cut clean, but the other end was blackened and burnt. At that discovery there entered his mind the first prescient warning of the possibility of some deep plan in which the pistol and the wick played important parts. With his brain seeking for a solution of that possibility, he proceeded to examine the pieces of string.