For centuries they have been sleeping. Under the law of custom, which no man dares to disobey, progress was impossible. The law of custom was the law of our own forefathers until the infusion of new blood and new customs shook them out of the groove and set them to choosing between the old and the new, and then to making new laws to meet new needs. This happened so long ago that if it were not for a few ceremonial survivals we might well doubt whether our forefathers were ever so held in bondage. With the precept--to do as your father did before you--an isolated race will remain stationary for centuries. There is, I believe, in all the history of travel, only one instance in which the absolute stagnation of a race has been proved, and that is the case of the Solomon Islands, the first of the Pacific groups to be discovered, and the last to be influenced by Europeans. In 1568 a Spanish expedition under Alvaro de Mendaña set sail from Peru in quest of the Southern continent. Missing all the great island groups Mendaña discovered the islands named by him Islas de Saloman, not because he found any gold there, but because he hoped thereby to inflame the cupidity of the Council of the Indies into fitting out a fresh expedition. Gomez Catoira, his treasurer, has left us a detailed account of the customs of the natives and about forty words of their language. And now comes the strange part of the story. Expedition after expedition set sail for the Isles of Solomon; group after group was discovered; but the Isles of Solomon were lost, and at last geographers, having shifted them to every space left vacant in the chart, treated them as fabulous and expunged them altogether. They were rediscovered by Bougainville exactly two centuries later, but it was not until late in the nineteenth century that any attempt was made to study the language and customs of the natives. It was then found that in every particular, down to the pettiest detail in their dress, their daily life and their language, they were the same as when Catoira saw them two centuries earlier, and so no doubt they would have remained until the last trump had not Europeans come among them. If, as there is good reason for believing, the modern Eskimo are the lineal descendants of the cave men of Derbyshire, who hunted the reindeer and the urus in Pleistocene times, the changelessness of their habits is to be ascribed to the same cause--the absence of a stimulus from without to break down the law of custom.