Then again we were silent, both pondering deeply. Had this remark of hers been mere guess-work? Was this carefully-concealed question but a masterstroke of woman’s ingenuity to ascertain whether I loved Mary Blain? It seemed very likely to be so. But she was so frank in all that I could not believe it of her. No doubt she had heard some story of our long-past love, and it had been exaggerated into an engagement, as such stories are so often apt to be.

Soon we emerged from the backwater into the main stream, and with our bow set in the direction of Laleham I rowed down with the current without loss of time. The twilight had fast deepened into dusk; the high poplars and drooping willows along the bank had grown dark, though the broad surface of the stream, eddying here and there where a fish rose, was still of a blue steely hue, and far away upstream only a long streak of grey showed upon the horizon. The stars shone down in the first faint darkness of the early night. Presently I glanced behind me, and in the distance saw a yellow ray, which my companion, well versed in river geography, told me was a light in one of the windows of Riverdene.

It had grown quite chilly, and the meadows were wreathed in faint white mist, therefore I spurted forward, and soon brought the boat up to the steps.

I knew that the world now held nothing for me but Eva.

When we entered the dining-room, a fine apartment with the table laid with shining plate, decorated with flowers, and illuminated with red-shaded candles, we were greeted, as we expected, by a loud and rather boisterous welcome by Dick and Mary. We were, of course, full of apologies, being nearly half an hour late. But up-river dinner is a somewhat movable feast, so Mrs Blain quickly forgave us, and while I sat by Mary on her one hand, Dick seated himself at Eva’s side.

Gaily we gossiped through a merry meal, washed down with a real Berncastel, and followed by old port, coffee, and curaçoa. Yet my mind was full of strange apprehensions. What possible connexion could these three women have with that crime which the police were withholding from the public? That they were all three aware that a tragedy had taken place seemed quite clear. Yet all remained silent.

I had detected in Mrs Blain’s manner an anxiety and nervousness which I had never before noticed, yet I refrained from putting any further question to her, lest I might, by doing so, show my hand. She could not keep from her tone when she spoke to me a note of insincerity, which my ear did not fail to detect.

Our conversation over dessert turned upon dogs, the performances of Mary’s pug having started the discussion, and quite inadvertently Dick, whose mind seemed always centred upon his work, for he was nothing if not an enthusiast, suddenly said—

“Dogs are now being used by the police to trace criminals. There is no better method when it can be accomplished, for a bloodhound will follow a trail anywhere with unfailing accuracy, even after some hours.”

“Do they actually use them now?” asked Mrs Blain in a strained, faltering voice, her wine-glass poised in her hand.