And in fear of the savages--and if you have read Robinson Crusoe you know how just his fears were--he went home trembling and loaded his muskets, and barricaded his cave, and passed sleepless nights watching for the savages who might come, and who came after all.
And so there are certain footprints in geology which there is no mistaking; and the prints of the ice-plough are among them.
For instance:--When they were trenching the new plantation close to Wellington College station, the men turned up out of the ground a great many Sarsden stones; that is, pieces of hard sugary sand, such as Stonehenge is made of.

And when I saw these I said, "I suspect these were brought here by icebergs:" but I was not sure, and waited.

As the men dug on, they dug up a great many large flints, with bottle-green coats.

"Now," I said, "I am sure.

For I know where these flints must have come from." And for reasons which would be too long to tell you here, I said, "Some time or other, icebergs have been floating northward from the Hog's Back over Aldershot and Farnborough, and have been trying to get into the Vale of Thames by the slope at Wellington College station; and they have stranded, and dropped these flints." And I am so sure of that, that if I found myself out wrong after all I should be at my wit's end; for I should know that I was wrong about a hundred things besides.
Or again, if you ever go up Deeside in Scotland, towards Balmoral, and turn up Glen Muick, towards Alt-na-guisach, of which you may see a picture in the Queen's last book, you will observe standing on your right hand, just above Birk Hall, three pretty rounded knolls, which they call the Coile Hills.