“Once it had happened, I did the thinking for the pair of us. Clearly enough, the thing was to avoid suspicion. That meant that people mustn't couple our names even casually. And the way to prevent that was to see as little of each other as possible in public. I dropped out of things, cut dances, left the theatrical affair, and posed as being engrossed in work. She advertised herself as dance-mad. It suited her well enough. Result: we hardly ever were seen in the same room. No one thought of linking our names in the remotest way. I gave her no presents. . . .”

“Think again,” Sir Clinton interrupted. “You gave her at least one present.”

Markfield reflected for some moments; then his face showed more than a trace of discomfiture.

“You mean a signet-ring? Good Lord! I forgot all about it, that night at the bungalow! So that's where you got your story about the initial ‘B.’ from? I never thought of that.”

Sir Clinton made no comment, and after a few seconds Markfield continued.

“In the early days, we wrote letters to each other—just a few. Later on, I urged her to burn them, for safety's sake. But she treasured them, apparently; and she wouldn't do it. She said they were quite safe in a locked drawer in her bedroom. Silverdale never entered her room, you know. It seemed safe enough. It was these damned letters that landed me in the end.

“Yvonne and I hadn't any reason to worry about Silverdale. He'd lost all interest in her and gone off after Avice Deepcar. Oh, that was all quite respectable and above-board. She's a decent girl—nothing against her. We'd have been quite glad to see him marry her, except that it wouldn't have suited our book. My screw was good enough for a single man. It wouldn't have kept two of us—not on the basis we needed, anyhow. And a divorce case might have got me chucked out of the Croft-Thornton. Where would we have been then? So you see that alley was barred.

“By and by, young Hassendean turned up. When I found he was getting keen on Yvonne, I encouraged her to keep him on her string. She had no use for the boy except as a dancing-partner; but we used him as a blind to cover the real state of affairs. So long as people could talk about him and her, they weren't likely to think of her and me. So she led him on until the brat thought he was indispensable. I suppose he fell in love with her, in a way. We never imagined he might be dangerous.

“That was the state of things up to ten days before the affair at the bungalow. There seemed to be no reason why it shouldn't have lasted for years. But just then Yvonne got news of this money that had been left her—about £12,000. That put a new light on the affair. It gave her an income of her own. We could afford to let Silverdale divorce her; then I could have chucked the Croft-Thornton, married her, and set up in private practice somewhere. Her money would have kept us going until I had scraped a business together; and no one cares a damn about the matrimonial affairs of a chemical expert in private practice.

“We talked it over, and we practically made up our minds to take that course. It seemed a bit too good to be true. Anyhow it would have got us out of all the hole-and-corner business. After three years of that, we were getting a bit sick of it. Another week or two, and Westerhaven would have had all the scandal it needed, if it was inclined that way. We'd have got each other. And Silverdale could have married his girl with all the sympathy of the town. Ideal, eh?”