I got to the pillar-box, which was just alongside the inn, without meeting a soul. The knowledge that my letter was safely posted gave me a distinct feeling of relief, and, retracing my steps as quickly as possible, I was soon back in the dinghy and pulling off again down the creek.

So far all was well, but as I drifted round the point into the open water, I began to realize what a difficult job I had in front of me. In the first place, it was quite conceivable that I was on a fool's errand. Notwithstanding my fears, Christine might be in no need of my assistance, and if that were the case my sudden appearance on the scene would be about the most embarrassing ordeal I could possible inflict on her. This was an unfortunate fact that had to be faced, however; the only question was how to make certain that she was safe without giving away the whole affair.

My strongest card was the one which had been thoughtfully provided by Manning himself. His last words had been a pressing invitation that I would come and see him on the barge as soon as I got back from London, and he could hardly blame me if I happened to select a particularly awkward moment for calling. Much as he might object to my visit, he would find it uncommonly difficult to invent any reasonable excuse for not asking me on board.

What I chiefly dreaded was the possibility that Christine might betray herself before she could recover from her surprise. In that event any further pretence on my part would be useless; Manning would at once guess the truth, or something very near it, and what the consequences might be God alone knew. Was I asking too much in making such a demand upon a girl's courage and coolness? It was a trial from which very few people would emerge successfully, but then I had had ample proof in Leixoes harbour that Christine's nerve was of no ordinary quality. Her self-possession on that occasion had been truly delightful, and though she would now be up against a much more severe test I had a kind of inward conviction that I could still depend upon her. Anyhow, there was no way of avoiding the risk unless I abandoned my purpose, an alternative on which I declined to waste even a moment's consideration.

All this time the tide was carrying me steadily up the estuary, my own efforts being confined to keeping the boat as near the shore as possible without losing the drift of the current. I made no attempt at rowing, for, anxious as I was to reach the barge, I was afraid that if Craill happened to be on deck the muffled creak of my rowlocks would probably attract his attention. I wanted my arrival to be absolutely unexpected, so that I could seize the chance of getting on board before anyone was prepared to dispute my purpose.

Now that the critical moment was approaching I felt as cool as a cucumber. Nothing steadies me like the prospect of immediate action, and, although my hatred of Manning was as bitter as ever, it no longer clouded or distorted my mind. It had, indeed, precisely the opposite effect, bracing all my faculties to their clearest and sharpest pitch.

I drifted along, listening intently, and keeping a constant look-out over my shoulder. I knew by the curve of the shore that I must be getting pretty near my goal, for just below where the barge lay the estuary made a slight turn to the north.

Suddenly, a few feet ahead of me, I caught sight of a shadowy anchor chain, rising from the water and stretching away into the gloom. I was so close that in another second I should have been on top of it, but a timely dig with my left-hand scull just saved me from this calamity. Almost simultaneously the black outline of the barge towered up above my head, and, gliding round the big blunt bow, I came quietly alongside an empty dinghy which was bobbing about on its painter at the foot of the accommodation ladder.

For a couple of seconds I remained perfectly still, gripping tight hold of the dinghy's gunwale, and staring up at the railing above me. I half expected to see Craill's ugly face come peering over the top, for if he were on deck he must have heard the splash which I had made in trying to avoid the chain. No such apparition materialised, however, and with a slight pull at the painter I drew into the side and rapidly hitched up my boat. The next moment I had mounted the ladder and was safely on board.

As far as I could see, I appeared to have the whole place to myself. It was very unlike an ordinary barge, for both fore and aft a high "coach-house" roof had been built up above the deck, so as to provide the cabins below with further light and head room. Between the two, and right in front of where I was standing, a broad companion-way led down to the interior.