Drury is also the author of Hunts in Dreams, The driftless area, and The Black Brook.
With these residuary soils of the driftless area, the mantle rock of glaciated tracts is in sharp contrast.
A comparison of otherwise similar counties lying within and without the driftless area shows an astonishing contrast.
Throughout the driftless area it has covered up many spots that would otherwise have been bare rocks.
In the glaciated area 61 per cent of the land is improved and in the driftless area only 43.5 per cent.
In the driftless area the average value per acre in 1910 was less than $24, while in the glaciated area it was nearly $64.
The ice, for some reason, failed to cover this driftless area though it overwhelmed the territory on all sides.
Various suggestions have been made in the attempt to explain the driftless area.
Thus the driftless area is in strong contrast with the immature drift topography about it, where lakes and waterfalls are common.