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62 Introduction to his 'Primitive Inhabitants of Scandinavia,' that we are 'unable properly to understand the significance of the antiquities of any individual country without at the same time clearly realizing the idea that they are the fragments of a progressive series of civilization, and that the human race has always been, and still is, steadily advancing in civilization.'

Enquiry into the origin and early development of the material arts, as judged of by comparing the various stages at which they are found existing, leads to a corresponding result. Not to take this argument up in its full range, a few typical details may serve to show its general character. Amongst the various stages of the arts, it is only a minority which show of themselves by mere inspection whether they are in the line of progress or of decline. Most such facts may be compared to an Indian's canoe, stem and stern alike, so that one cannot tell by looking at it which way it is set to go. But there are some which, like our own boats, distinctly point in the direction of their actual course. Such facts are pointers in the study of civilization, and in every branch of the enquiry should be sought out. A good example of these pointer-facts is recorded by Mr. Wallace. In Celebes, where the bamboo houses are apt to lean with the prevalent west wind, the natives have found out that if they fix some crooked timbers in the sides of the house, it will not fall. They choose such accordingly, the crookedest they can find, but they do not know the rationale of the contrivance, and have not hit on the idea that straight poles fixed slanting would have the same effect in making the structure rigid. In fact, they have gone half-way toward inventing what builders call a 'strut,' but have stopped