One of the great advantages of the study of old Norse or Icelandic literature is the insight given by it into the origin of world-wide superstitions. Norse tradition is transparent as glacier ice, and its origin is as unmistakable.

Incontestably, the great centres of population in the primeval ages were the chalklands, and next to them those of limestone. The chalk first, for it furnished man with flints, and the limestone next when he had learned to barter.

The fold is that place where He keeps His flock shut behind the hurdles of the Ten Commandments. Every now and then, a sheep leaps one of these hurdles or pushes his way between them and runs away into forbidden pastures. Then the Good Shepherd goes after the erring sheep and brings it back.

The prime feature in Cornish geology is the upheaval of the granite, distorting, folding back, and altering the superincumbent beds.