Why had the soundings made under the direction of James Starr during the last years of the working stopped just at that limit, on the very frontier of the new mine?
That was all chance, which takes great part in researches of this kind.
However that might be, there was, under the Scottish subsoil, what might be called a subterranean county, which, to be habitable, needed only the rays of the sun, or, for want of that, the light of a special planet.
Water had collected in various hollows, forming vast ponds, or rather lakes larger than Loch Katrine, lying just above them.

Of course the waters of these lakes had no movement of currents or tides; no old castle was reflected there; no birch or oak trees waved on their banks.
And yet these deep lakes, whose mirror-like surface was never ruffled by a breeze, would not be without charm by the light of some electric star, and, connected by a string of canals, would well complete the geography of this strange domain.
Although unfit for any vegetable production, the place could be inhabited by a whole population.

And who knows but that in this steady temperature, in the depths of the mines of Aberfoyle, as well as in those of Newcastle, Alloa, or Cardiff--when their contents shall have been exhausted--who knows but that the poorer classes of Great Britain will some day find a refuge?
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