That tree (which I am little like to forget) stood hard by the harbour-side. It was a black night, but lights were in the houses, and nearer hand in the quiet ships; there was a shining of the city on the one hand, and a buzz hung over it of many thousands walking and talking; on the other, it was dark, and the water bubbled on the sides. I spread my cloak upon a builder's stone, and made her sit there; she would have kept her hold upon me, for she still shook with the late affronts; but I wanted to think clear, disengaged myself, and paced to and fro before her, in the manner of what we call a smuggler's walk, belabouring my brains for any remedy. By the course of these scattering thoughts I was brought suddenly face to face with a remembrance that, in the heat and haste of our departure, I had left Captain Sang to pay the ordinary. At this I began to laugh out loud, for I thought the man well served; and at the same time, by an instinctive movement, carried my hand to the pocket where my money was. I suppose it was in the lane where the women jostled us; but there is only the one thing certain, that my purse was gone. "You will have thought of something good," said she, observing me to pause. At the pinch we were in, my mind became suddenly clear as a perspective-glass, and I saw there was no choice of methods. I had not one doit of coin, but in my pocket-book I had still my letter on the Leyden merchant; and there was now but the one way to get to Leyden, and that was to walk on our two feet. "Catriona," said I, "I know you're brave, and I believe you're strong--do you think you could walk thirty miles on a plain road?" We found it, I believe, scarce the two-thirds of that, but such was my notion of the distance. "David," she said, "if you will just keep near, I will go anywhere and do anything. The courage of my heart, it is all broken. Do not be leaving me in this horrible country by myself, and I will do all else." "Can you start now and march all night?" said I. "I will do all that you can ask of me," she said, "and never ask you why. I have been a bad, ungrateful girl to you; and do what you please with me now! And I think Miss Barbara Grant is the best lady in the world," she added, "and I do not see what she would deny you for at all events." This was Greek and Hebrew to me; but I had other matters to consider, and the first of these was to get clear of that city on the Leyden road. It proved a cruel problem; and it may have been one or two at night ere we had solved it. Once beyond the houses, there was neither moon nor stars to guide us; only the whiteness of the way in the midst, and a blackness of an alley on both hands. The walking was besides made most extraordinary difficult by a plain black frost that fell suddenly in the small hours and turned that highway into one long slide.