Almost unobserved, too, the Secretary for Foreign Affairs and Earl Fotheringay had also manoeuvred their steps towards the doorway; and now, when Casteno tried to speak with them, they took advantage of a pause created by the sudden rattle of the colonel’s carriage as he drove towards the Strand to slip out of the room. A minute later there arose the sound of a loud commotion, as of doors banged and of horses urged to a gallop, and both of their broughams followed hard in the old soldier’s wake.

“You see,” said Don José to me, with a little bitterness, “they are not men big enough to face me out over this matter. They prefer to fling their poisoned darts at me and to leave them to work their own mischief, whilst they scuttle off like naughty children who have thrown some stones through a window and are quite content with the sight of the damage they have done, without a thought of the anguish of the householder. Well, well! all this is the trouble which you will no doubt remember that I, at least, expected and warned you against when I asked you to join forces with me. I must not now rail against my own fate, but I do appeal to you—give me a fair chance, do not desert me.”

For an instant I wavered. This quest now had assumed truly gigantic dimensions. Even Cooper-Nassington seemed only a dim, far-off figure against the overwhelming personality of Cuthbertson. More than that, I knew if I clung to Casteno I should have one of the most stern fights with Colonel Napier, who would stop at nothing to keep Doris apart from me.

None the less, I had my own notions of honour likewise, and it did not concern me much that they differed from Earl Fotheringay’s or Lord Cyril Cuthbertson’s. After all, had I not taken my fee from Don José? Had he not paid me all that I asked? Had I not passed him the sacred pledge of my word? And so, at last, I gave my decision.

“I have seen nothing in your life, your behaviour, or your conduct,” I cried, “to warrant me in throwing you over in the way those men have suggested. Until I find some good reason to believe that your intentions are dishonourable, that your career has been criminal, that your desires are hostile to England, I cannot desert you.”

“Well spoken,” replied Don José earnestly. “Your determination does you credit. Believe me, you shall find no cause to make you ashamed that you ever allied yourself with me. On the contrary, as you go deeper into this business you will realise that you have done well to stick to me, however baffling and perplexing may seem some of the adventures I may have to ask you to undertake. And that reminds me of the real business we have in hand to-night! How did you get on at the House of Commons with Cooper-Nassington?”

“Very much better than I could have dared to expect,” I replied with frankness, and returning him his sealed packet addressed to Cuthbertson. In a few graphic sentences I described to him how I had gone to the house of the hunchback with the Member of Parliament, and the extraordinary adventures we had undergone there. Instead, however, of being pleased with the result of the quest, I could see that the Spaniard was greatly disturbed at something that had happened on that occasion. At first he would not tell why we ought not to congratulate ourselves that Zouche had promised to decipher those manuscripts and communicate their contents within a fortnight to Mr Cooper-Nassington. He tried to put me off with commonplace expressions like “Time will prove,” “Never count your chickens,” and “Trust no man further than you can throw him;” but when he realised that I was not going to be denied he admitted that my news about the attempts on the hunchback’s life was much more serious than anybody had any idea of, because they might terrify Zouche and make him do things he would not otherwise dream of.

“But we two are men with brains, hands, resolution,” I interjected. “Why need we stand by and let other people like Fotheringay come in and benefit by our labours? Let us mount guard over Zouche until he has got through his task of deciphering the documents.”

“That’s exactly what I was thinking,” returned Casteno, “but it is not so easy to do as it seems. For one thing, Zouche would not let us act in the capacity of his guardians if he knew we had any aspirations at all for that office. Another thing—where can we hide ourselves? And then,” he added after a significant pause, “I wanted you to be busy on another mission. I had a particular reason for wishing that you should go down to Southampton to-morrow afternoon, when the royal mail steamer Atrato is expected. A lady whom I want you to meet is coming by that boat. As a matter of fact, she is bringing certain valuable documents for me and for the Order of St. Bruno, and she will need all the protection you can give her between the Solent and the Thames if she isn’t kidnapped by some friends of Fotheringay, who, when he was in Mexico, learnt all about her treasures.”

“In that case you must watch the hunchback,” I said decisively, “whilst I run down from Waterloo to Southampton. The whole business won’t take me more than ten hours from London to dock and dock to London.”