constantly moving toward the sun, then not only would we find, as I
have suggested in the case of glaciers, the accumulated masses of
rubbish piled up in great windrows or ridges along the lines where
the face of the ice-sheet melted, but we would naturally expect that
the farther north we went the less we would find of these materials;
in other words, that the ice, advancing southwardly, would sweep the
north clear of _débris_ to pile it up in the more southern regions.
But this is far from being the case. On the contrary, the great
masses of the Drift extend as far north as the land itself. In the
remote, barren grounds of North America, we are told by various
travelers who have visited those regions, "sand-hills and erratics
appear to be as common as in the countries farther south."[5] Captain
Bach tells us[6] that he saw great chains of sand-hills, stretching

[1. "A Short American Tramp," pp. 68, 107.

2. Ibid., p. 68.

3. Ibid., p. 72.

4. Ibid., p. 76.

5. "The Great Ice Age," p. 391.

6. "Narrative of Arctic Land Expedition to the Mouth of the Great
Fish River," pp. 140, 346.]

{p. 37}

away from each side of the valley of the Great Fish River, in north