“No, I didn’t,” he replied, but he kept his gaze steadily averted from mine. “No doubt I ran too fast to notice anything. Besides, I always keep my head down.” And, pretending to yawn, he rose unsteadily to his feet and took a seat near the table, whereon I had laid breakfast for us both.

Of course, I should like to have asked him about the knife which I had watched him sharpen with so much diabolical care, but I realised that for some secret reason this innocent-looking Spaniard was not really telling me the truth about his early morning mission; and, not wanting to be filled up with any more fables, I decided to hold my tongue about the matter, for a time at all events. The incident, however, had put me thoroughly on my guard, and, without letting him become conscious of what was, after all, a rather subtle change of front, I kept a much closer watch than usual on him right through the meal, when we chatted a lot of commonplaces.

All the same, he seemed to feel that we had little time to waste when breakfast was finished and we had started our cigarettes. As the seconds slipped on, and I showed no unusual haste to be off, his manner grew jerky and nervous, and finally he gave the signal to rise with a quick apology to me.

“Really, we must be off,” he said. “I feel quite anxious about what is happening at the hunchback’s. Do let us get into some secure place of concealment before Lord Fotheringay or his envoy appears again on the scene.”

With a great affectation of laziness I rose and followed him down Stanton Street; and this time I put a double safety-lock on my office, to save me from any more surprise visits from men like Lord Cyril Cuthbertson. Now, as it happens, the quickest route from Stanton Street to the Strand is by way of a long, dark, narrow passage, and although Casteno hurried past I made him retrace his steps for a few yards and walk with me through this. At first I imagined I had done this from purely British obstinacy and habit, but all at once I became conscious that some deeper influence and habit must have been at work, for on rounding a bend I was startled to come across a group of early printers’ boys and charwomen gathered excitedly around some object that lay on the ground. This tiny crowd instinctively parted at our approach, and as we passed into their midst I was horrified to see Colonel Napier’s clumber spaniel Fate stretched on the path, with a great gaping cut over its heart!

“Some brute has stabbed it,” said one of the boys, who had been kneeling beside it endeavouring to stop the flow of blood with his dirty handkerchief. “I did my best for him, but he was too far gone. He’s almost dead.” But suddenly the dog seemed to rouse himself—to lift his head—then, catching sight of Casteno, he gave a low growl and made a movement as if he would snap at his legs.

The Spaniard jumped back nimbly, and one of the women exclaimed: “Why, mister, he seems to know you.”

“He doesn’t. I have never seen him before,” cried Casteno. And just then death convulsions seized the poor brute, and as the crowd watched the dog die the incident passed rapidly out of mind. I did not, however, forget it totally, nor the fact that Fate was one in a thousand for sagacity and faithfulness. But what, perhaps, impressed me the most was the shape and size of the wound in the dog’s side. I could have sworn that it had been made by the dagger I had seen Don José sharpen in the glare of my office fire!

Unfortunately, up to that point I had nothing definite to go upon except the most wild and improbable suspicion. After all, why should the Spaniard kill Colonel Napier’s dog? Nothing was to be gained by a piece of petty revenge such as that. As a consequence, I did not worry myself about the incident further, but contented myself by giving the boy who had spoken to me first a shilling to wheel the dead dog to Whitehall Court, and then Casteno and I hastened along Parliament Street and soon appeared outside the closed curio shop.

To all appearances, then, nothing unusual had happened to Peter Zouche or to his premises. The street in which the old curiosity store stood was just as silent and deserted as it had been the previous night when Mr Cooper-Nassington and I drove up and had that memorable interview with the hunchback about the contents of the manuscripts. Nobody seemed astir, no detective appeared on the watch.