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been over the pass, and I should never have known of its existence. Now that the cloud was there, I began to doubt my memory, and to be uncertain whether it had been more than a blue line of distant vapour that had filled up the opening. I could only be certain of this much, namely, that the river in the valley below must be the one next to the northward of that which flowed past my master’s station; of this there could be no doubt. Could I, however, imagine that my luck should have led me up a wrong river in search of a pass, and yet brought me to the spot where I should detect the one weak place in the fortifications of a more northern basin? This was too improbable. But even as I doubted there came a rent in the cloud opposite, and a second time I saw blue lines of heaving downs, growing gradually fainter, and retiring into a far space of plain. It was substantial; there had been no mistake soever. I had hardly made myself completely sure of this ere the rent in the clouds joined up again, and I could see nothing more.

What, then, should I do? The night would be upon me shortly, and I was already chilled with standing still after the exertion of climbing. To stay where I was would be impossible; I must either go backwards or forwards. I found a rock which gave me shelter from the evening wind, and took a good pull at the brandy flask, which immediately warmed and encouraged me.

I asked myself, Could I descend upon the river-bed beneath me? It was impossible to say what precipices might prevent my doing so. If I were on the river-bed, dare I cross the river? I am an excellent swim-