That such stone blades were used with a haft is shown by the only hafted specimen, No. 56628 [214], Fig. 132, from Nuwŭk. This is a rather small adz. The head of dark green jade differs from those already described only in dimensions, being 4 inches long, 2.1 wide, and 1.7 thick. The haft is of reindeer antler and in shape much like that of No. 56638 [309], but has only one hole for the lashing. The lashing is of the usual stout seal thong and put on in the usual fashion. No. 89673 [1423] is an old black adz from Sidaru of the same pattern as those described, but very smoothly and neatly made. About one-half of this specimen has been cut off for whetstones, etc. The next step is to make the lashing more secure by cutting transverse grooves on the upper face of the head to hold the thong in place. This has been done on No. 56667 [215], figured in Point Barrow Rept., Ethnology, Pl. II, Fig. 5, an adz of dark olive green jade, from Utkiavwĭñ, which shows two such grooves, broad and shallow, running across the upper face. Of these two classes the collection contains thirteen unhafted specimens and one hafted specimen, all of jade. As cutting these grooves in the stone is a laborious process, the device of substituting some more easily worked substance for the back part of the head would naturally suggest itself. [Illustration: FIG. 133.--Adz-head of jade and bone. 1/3] [Illustration: FIG. 134.--Adz-head of bone and iron, without eyes. 1/3] Fig. 133, No. 89658 [1072], from Utkiavwĭñ, has a long blade of black stone with the butt slightly tapered off and imbedded in a body of whale’s bone, which has a channel 1 inch wide, for the lashing, cut round it and a shallow socket on the face to receive the end of the haft. Adz heads of this same type continued in use till after the introduction of iron, which was at first utilized by inserting a flat blade of iron into just such a body, as is shown in Fig. 134 (No. 89877 [752], from the cemetery at Utkiavwĭñ). [Illustration: FIG. 135.--Adz-head of bone and iron, with vertical eyes. 1/3] [Illustration: FIG. 136.--Adz-head of bone and iron, with vertical eyes. 1/3]