The loose shaft (ígimû) is of bone, whale’s rib or jaw, and has two transverse holes above the shoulder to receive the end of the assembling line (sábromia), which not only holds the loose shaft in place, but also connects the other parts of the shaft so that in case the wood breaks the pieces will not be dropped. It is a long piece of seal thong, of which one end makes a turn round the loose shaft between the holes; the other end is passed through the lower hole, then through the upper and carried down to the tip of the shaft, where it is hitched just below the whalebone whipping, as follows: three turns are made round the shaft, the first over the standing part, the second under, and the third over it; the end then is passed under 3, over 2, and under 1 (Fig. 228), and all drawn taut; it then runs down the shaft almost to the butt-lashing and is secured with the same hitch, and the end is whipped around the butt of the ice pick with five turns. The head (naúlɐ) is of the ordinary pattern, 2.8 inches long, with a copper blade and antler body. The line (túkăktĭn) is a single piece of seal thong 9 feet long, and is fastened to the head without a leader, by simply passing the end through the line-hole, doubling it over and stopping it to the standing part so as to make a becket 21 inches long. The other end is made fast round the shaft and assembling line just back of the middle, as follows: An eye is made at the end of the line, by cutting a slit close to the tip and pushing a bight of the line through this. The end then makes a turn round the shaft, and the other end, with the head, is passed through this eye and drawn taut. When mounted for use, the head is fitted on the tip of the loose shaft as usual and the line brought down to the tip of the shaft and made fast by two or three round turns with a bight tucked under, so that it can be easily slipped. It is also confined to the loose shaft by the end of the assembling line, which makes one or two loose turns round it. The slack of the line is doubled into “fakes” and tucked between the shaft and assembling line. [Illustration: FIG. 229.--Model of a seal harpoon. 1/3]