Not a sound reached me, except the mournful muffled hooting of a steamer's syren at intervals; no doubt some wretched collier, nosing her way at half-speed through the fog, in momentary terror of collision.
I don't think I ever felt so cut off from humanity in my life as in that tiny yacht, surrounded as I was by impenetrable density above and around, and the deep rushing tide below in a lonely water-way.
No doubt this eerie feeling of loneliness had a great deal to do with my sensations later on, which, on looking back in after-days, have often struck me as being more acute and nervous than they had any right to be.
Be that as it may, I was not nervous when I closed the hatch and "turned in," for I recollect congratulating myself that I was in a safe anchorage, out of the way of traffic, and not on board the steamer which I had heard so mournfully making known her whereabouts in the open sea.
I think my "nerves" had their first real unsettling about half an hour afterwards, just as I was sinking off into a peaceful, profound slumber, for it seemed to me that I had been roused by a sound like a scream of pain or fear, coming muffled and distant through the fog; but from what direction, whether up or down the river, or from the shore, I could not tell.
I raised myself on my elbow and listened intently, but heard nothing more, and reflecting that, even if what I had heard was more than fancy, I was helpless, shut in on every hand by impenetrable fog, to render aid; I could do no more than utter a fervent hope, amounting to a prayer, that no poor soul had strayed into the water on such a night. It is easy, too, when roused out of a doze, to imagine one has only fancied a thing, and I had soon persuaded myself that what I had heard was no more than the shriek of a syren or cry of a disturbed sea-gull, and sank once more into a doze, which this time merged into that solid sleep which comes to those who have had a long day in sea-air.
Somewhere in that vague period we are apt to call "the middle of the night," and which may mean any time between our falling asleep and daybreak, I dreamt that I was in bed in my London lodgings, that a chum of mine had come in to arouse me, and to do so had gently kicked the bedpost, sending a jarring sensation up my spine.
At first I was merely angry, and only stirred in my sleep; but he did it again, and I awoke, intending to administer a scathing rebuke to the disturber of my peace.
But I awoke on board the Thelma, and realised, with a feeling akin to alarm, that the sensation of "jarring" had been real, and the knocking which caused it came from something or some one outside the boat.
At first I could hardly believe my senses, and raised myself on my elbow, my whole being strained as it were into the one faculty for listening.