The Ceco, so called because of his defective vision, was apparently a man of means, for his tips to the waiters and maids were always generous, and when a guest, he and his daughter always ordered the best that could be procured. They came from Florence, the padrone thought, but of that he was not quite certain. The letters and telegrams he received securing rooms were dispatched from various towns in both France and Italy, which seemed to show that they were constantly travelling.

That was all the information we could gather. The identity of the mysterious Paolo Melandrini was, as yet, unproven. My primary object in travelling to Italy was not accomplished, but I nevertheless felt satisfied that I had at last discovered two of poor Blair’s most intimate and yet secret friends.

But why the secrecy? When I recollected how close had been our friendship, I felt surprised, and even a trifle annoyed that he had concealed the existence of these men from me. Much as I regretted to think ill of a friend who was dead, I could not suppress a suspicion that his acquaintance with those men was part of his secret, and that the latter was some dishonourable one.

Soon after midday, I crammed my things into my valise, and, impelled by a strong desire to return to safeguard the interests of Mabel Blair, left Lucca for London. Babbo travelled with me as far as Pisa, where we changed, he journeying back to Florence and I picking up the sleeping-car express on its way through from Rome to Calais.

While standing on the platform at Pisa, however, the shabby old man, who had grown thoughtful during the past half-hour or so, suddenly said—

“A strange idea has occurred to me, signore. You will recollect that I learned in the Via Cristofano that the Signor Melandrini wore gold-rimmed glasses. Is it possible that he does so in Florence in order to conceal his defective sight?”

“Why—I believe so!” I cried. “I believe you’ve guessed the truth! But on the other hand, neither his servant nor the neighbours suspected him of being a foreigner.”

“He speaks Italian very well,” agreed the old man, “but they said he had a slight accent.”

“Well,” I said, excited at this latest theory. “Return at once to the Via San Cristofano and make further inquiries regarding the mysterious individual’s eyesight and his glasses. The old woman who keeps his rooms has no doubt seen him without his glasses, and can tell you the truth.”

“Signore,” was the old fellow’s answer. And I then wrote down for him my address in London to which he was to dispatch a telegram if his suspicions were confirmed.