See how the top of the sand is dug out into deep waves and pits, filled up with gravel.

And see, too, how over some of the gravel you get sand again, and then gravel again, and then sand again, till you cannot tell where one fairly begins and the other ends.

Why, here are little dots of gravel, six or eight feet down, in what looks the solid sand rock, yet the sand must have been opened somehow to put the gravel in.
You say you have seen that before.

You have seen the same curious twisting of the gravel and sand into each other on the top of Farley Hill, and in the new cutting on Minley Hill; and, best of all, in the railway cutting between Ascot and Sunningdale, where upon the top the white sand and gravel is arranged in red and brown waves, and festoons, and curlicues, almost like Prince of Wales's feathers.

Yes, that last is a beautiful section of ice-work; so beautiful, that I hope to have it photographed some day.
Now, how did ice do this?
Well, I was many a year before I found out that, and I dare say I never should have found it out for myself.