The scroll-patterns illustrated by Dr. March may at one time and place have had the origin supposed by Dr. March, but it does not appear to me to be probable that they would have arisen in this way both in South Europe and in Mexico. I have shown (p. 51, Fig. 27) how a simple guilloche has arisen from interlocking birds' heads. The Vitruvian scroll design occurs among the Tugeri head-hunters of New Guinea, and it is most improbable that it owes its origin to basketry. It is probable that the Pueblo pottery with curvilinear patterns, such as Plate III., Fig. 6, is more recent than that with angular designs; but I shall return to this later on. In fact, I would feel inclined to state that Dr. March's view is possible for the origin of the patterns in question, once and in a restricted locality, but highly improbable for wide application.
There is a great tendency for spirals to degenerate into concentric circles; examples could be given from New Guinea, America, Europe, and elsewhere. In fact, one usually finds the two figures associated together, and the sequence is one of decadence, never the evolution of spirals from circles. The intermediate stage has been aptly termed a "bastard spiral" by Dr. Montelius, "that is to say, concentric circles to which the recurved junction-lines give, to a casual glance, the appearance of true spirals."[30]
[30] O. Montelius, "Sur les Poignées des Epées et des Poignards en Bronze," _Congr. prehist. Stockholm_, 1874, ii. p. 891.
"The strangest skeuomorph of all," writes Dr. March, "was that common to the early inhabitants of Northern Europe. They were adepts in basketry, and in wattle-work for walls and ramparts. Moreover, the pliant bark of the birch was ever ready to the hand for a thousand purposes of life. The Norwegian still makes hinges for gates and loops for the oar out of the entwisted fibre. The old Norseman spoke of the rudder withy, for the earliest rudder was an oar; and leather thongs were also used to keep the oar against the thole-pin. The skeuomorph consists of a withy wound upon itself. (Plate VII., Fig. 11.) This device, wrongly called a rope-pattern, gained such an ascendency over the northern mind that it was employed sometimes as a symbol (Plate VII., Fig. 12), like the reefing knot on Roman altars. (Plate VII., Fig. 13.) It was used also by the ancient Hittites. (Plate IV., Fig. 1.)