“The foundations seem secure enough,” said I, looking down.

“True, but natural foundations are sometimes deceptive, and that bubbling spring may be quietly washing these away. We must use a little art here. Go, Coppet,” he added, turning to the carpenter, “fetch all the men, and your tools, and as many heavy timbers as you can readily lay hands on. Come, Max, help me to lift this one.”

The decision of Lumley’s manner and the energetic way in which he threw off his coat and set to work, convinced me that he thought danger of some sort was impending. I therefore followed his example, and set to with a will.

We fixed a heavy log in front of the suspected mass of rock, placing its end against the centre of the mass, and sinking the other end into the ground—having previously, however, sunk a strong crossbeam into the ground to bear the pressure of that end.

“This of itself,” said my chief, “will go far to avert evil, but we will adopt your tactics, Max, and, by giving it superabundance of strength, make assurance doubly sure.”

In pursuance of this plan, he ordered the men to plant several ponderous logs in the same position as the first beam, over which other logs were thrown crosswise, and the whole was weighted with heavy stones.

During our operations, which occupied us all till evening, the rain increased tenfold, and at last came down in absolute sheets, flooding our dam to such an extent that it overflowed nearly all round the brim in pretty solid cataracts of dirty water, which brought down branches and leaves and other débris from the higher parts of the stream.

I was gratified to see, however, that our embankment showed no symptoms of weakness, and felt assured that the powerful structure we had just set up was more than sufficient to prevent any rupture in the rock itself. Comforted by these thoughts, Lumley and I returned to the hall in a burst of thunder, lightning, and rain—thoroughly saturated, and in a condition to do ample justice to the sea-biscuit, fried salt-pork, hung whitefish and tea, which Salamander had prepared for supper.

Blondin, being a polite, intelligent fellow as well as our foreman, was privileged to take his meals with us, besides occupying one of our four rooms. In consequence of this we conversed chiefly in the patois French of the country, for the worthy man was not deeply learned in English. Salamander messed with the men in their own house, after preparing and spreading our meals.

“What say you to a game of chess?” said Lumley to me, after the tea-things had been carried away by Blondin.