“Then there was something in it?” I asked.

“There was black hell in it. There wasn’t any Gussiter, but there was a mighty fine little syndicate of crooks with old man Gresson at the back of them. First thing, I started out to get the cipher. It took some looking for, but there’s no cipher on earth can’t be got hold of somehow if you know it’s there, and in this case we were helped a lot by the return messages in the German papers. It was bad stuff when we read it, and explained the darned leakages in important noos we’ve been up against. At first I figured to keep the thing going and turn Gussiter into a corporation with John S. Blenkiron as president. But it wouldn’t do, for at the first hint of tampering with their communications the whole bunch got skeery and sent out SOS signals. So we tenderly plucked the flowers.”

“Gresson, too?” I asked.

He nodded. “I guess your seafaring companion’s now under the sod. We had collected enough evidence to hang him ten times over.... But that was the least of it. For your little old cipher, Dick, gave us a line on Ivery.”

I asked how, and Blenkiron told me the story. He had about a dozen cross-bearings proving that the organisation of the “Deep-breathing” game had its headquarters in Switzerland. He suspected Ivery from the first, but the man had vanished out of his ken, so he started working from the other end, and instead of trying to deduce the Swiss business from Ivery he tried to deduce Ivery from the Swiss business. He went to Berne and made a conspicuous public fool of himself for several weeks. He called himself an agent of the American propaganda there, and took some advertising space in the press and put in spread-eagle announcements of his mission, with the result that the Swiss Government threatened to turn him out of the country if he tampered that amount with their neutrality. He also wrote a lot of rot in the Geneva newspapers, which he paid to have printed, explaining how he was a pacifist, and was going to convert Germany to peace by “inspirational advertisement of pure-minded war aims”. All this was in keeping with his English reputation, and he wanted to make himself a bait for Ivery.

But Ivery did not rise to the fly, and though he had a dozen agents working for him on the quiet he could never hear of the name Chelius. That was, he reckoned, a very private and particular name among the Wild Birds. However, he got to know a good deal about the Swiss end of the “Deep-breathing’ business. That took some doing and cost a lot of money. His best people were a girl who posed as a mannequin in a milliner’s shop in Lyons and a concierge in a big hotel at St Moritz. His most important discovery was that there was a second cipher in the return messages sent from Switzerland, different from the one that the Gussiter lot used in England. He got this cipher, but though he could read it he couldn’t make anything out of it. He concluded that it was a very secret means of communication between the inner circle of the Wild Birds, and that Ivery must be at the back of it.... But he was still a long way from finding out anything that mattered.

Then the whole situation changed, for Mary got in touch with Ivery. I must say she behaved like a shameless minx, for she kept on writing to him to an address he had once given her in Paris, and suddenly she got an answer. She was in Paris herself, helping to run one of the railway canteens, and staying with her French cousins, the de Mezières. One day he came to see her. That showed the boldness of the man, and his cleverness, for the whole secret police of France were after him and they never got within sight or sound. Yet here he was coming openly in the afternoon to have tea with an English girl. It showed another thing, which made me blaspheme. A man so resolute and single-hearted in his job must have been pretty badly in love to take a risk like that.

He came, and he called himself the Capitaine Bommaerts, with a transport job on the staff of the French G.Q.G. He was on the staff right enough too. Mary said that when she heard that name she nearly fell down. He was quite frank with her, and she with him. They are both peacemakers, ready to break the laws of any land for the sake of a great ideal. Goodness knows what stuff they talked together. Mary said she would blush to think of it till her dying day, and I gathered that on her side it was a mixture of Launcelot Wake at his most pedantic and schoolgirl silliness.

He came again, and they met often, unbeknown to the decorous Madame de Mezières. They walked together in the Bois de Boulogne, and once, with a beating heart, she motored with him to Auteuil for luncheon. He spoke of his house in Picardy, and there were moments, I gathered, when he became the declared lover, to be rebuffed with a hoydenish shyness. Presently the pace became too hot, and after some anguished arguments with Bullivant on the long-distance telephone she went off to Douvecourt to Lady Manorwater’s hospital. She went there to escape from him, but mainly, I think, to have a look—trembling in every limb, mind you—at the Château of Eaucourt Sainte-Anne.

I had only to think of Mary to know just what Joan of Arc was. No man ever born could have done that kind of thing. It wasn’t recklessness. It was sheer calculating courage.