+123. Fishing.+ Fishing furnishes a parallel case. A Thlinkit fisherman puts on a cap which resembles the head of a seal, and hiding his body between the rocks makes a noise like a seal. This entices seals towards him and gives him opportunity to kill them.[175] The Australians had a fish spear and a net made of fibers, which were chewed by the women to make them soft. They had no hooks until they got them from the whites.[176] Weirs for fishing were built of stone. One is described which was a labyrinth of stone circles, of which some were connected with each other. The walls are three or four feet high. The fish get confused and are caught by hand.[177] Remains of weirs, consisting of wattled work of reeds or saplings, are found in the rivers of northern Europe. The device of putting into the water some poisonous or narcotic substance in order to stupefy the fish is met with all over the globe. It was employed by the aborigines on Lanzarote (Canary Islands). There the fish were freshened in unpoisoned waters.[178] It is quite impossible that this device should have spread only by contact. It must have been independently invented. It secured a large amount of fish with very little trouble. The Ainos dam the stream, leaving only a few openings, opposite each of which, below, they build a platform. The fish jump at the opening, but some miss it and fall on the platform where they are caught.[179] The Polynesians depend largely on fish for their food supply. They had nets a thousand ells long, which could be handled only by a hundred men. They made hooks of shell, bone, and hard wood.[180] The first fishhooks of prehistoric men in Europe and North America were made of pieces of bone pointed at both ends, the cord being attached in the middle.[181] The Shingu Indians fished with bow and arrow, nets, scoop baskets, and weirs. Bait was used to make the fish rise. Then they were shot with an arrow. The people had no hooks, but eagerly adopted them when they became acquainted with them.[182] They and other Brazilians set a long cylindrical basket in a stream in such a way that when the fish enters it and seizes the bait, it tilts up into a perpendicular position. The fish cannot then get out.[183]