It may seem foolish to make all this fuss about finding a big stone in a field. But these ignorant red men were much wiser than we are if we don't wonder about it too. Wonder is the beginning of knowledge; and the Indians thus took the first step toward one of the great discoveries of geology. It was just such wondering on the part of scientific men that led to their finding out not only how these big stones got into strange lands but how certain kinds of hills that we have just been reading about were made. For, as you must have already guessed, the moving of these boulders was one of the many jobs Mr. Glacier did for us during the Ice Age. But pretend you don't know the answer. It took the wise men a long time to find it and that's where the fun comes in--in the hide and seek. [Illustration: _From a photograph by Bourne & Shepherd, Calcutta_ THE STRANGE OLD INDIAN OF MOUNT ABU If those Minnesota Indians thought a boulder of the usual shape was some big chief from another land, what would they have thought if they had set eyes on this solemn old creature? He sits by the hour--like Socrates in the market-place--and has sat for ages gazing down at his image in a lake at the foot of Mount Abu in India. He was carved into that shape by sands blown from the North Indian desert acting on the softer parts of the rock. Most Indians, as you know, are silent people, but this old chap, so I hear, never speaks at all! Yet some day he may, all of a sudden, take a jump! Boulders do that sometimes, as you will see before you have finished this chapter. ] ON THE NORTH END OF THE WORLD Some of the boulders seem to have belonged to Alpine Clubs, for you find them away up on mountain sides; some of them as high as 6,000 feet--that's over a mile you know--above the level of the sea. And often these boulders are not of the same material as the huge pieces of broken rock that fall from the neighboring mountain walls. Moreover the blocks of stone from the mountain are angular; they are not nicely rounded off as are boulders and pebbles. It's that way all over the north end of the world as far south as the Ohio in this country and the Alps in Europe. [Illustration: WOULDN'T IT MAKE YOU NERVOUS, TOO? This picture is from a story about a little boy who had to cross a field full of big, dark boulders like this at night, and how nervous it made him. ] But there's one place in which you never will find boulders, and that's in a country where there are caves of any considerable size. Neither will you find such caves where there are boulders.