The knives with the projecting rib upon the tang are by no means uncommon, and there are several in the Museum of the Royal Irish Academy and elsewhere. Canon Greenwell has one (6⅜ inches) from Ballynascreen, Co. Tyrone, much like that from the Heathery Burn Cave (Fig. 252). [Illustration: Fig. 252.—Heathery Burn Cave. ½] [Illustration: Fig. 253.—Harty. ½] [Illustration: Fig. 254.—Ireland. ½] The knife or dagger with a plain tang and an ornamented blade engraved as Fig. 254 is in the Museum of the Royal Irish Academy. Another, simply ridged and with a single rivet-hole in the tang, found at Craigs,[747] Co. Antrim, is in the collection of Mr. R. Day, F.S.A. It is less round-ended than the blade with a central rib along it and one rivet-hole in the tang, shown in Fig. 255. This is in my own collection, and was found at Ballyclare, Co. Antrim. A mould for blades of this character will subsequently be mentioned. Another form of knife, unless possibly it was intended for a lance-head, is shown in Fig. 256. This specimen is also from the Reach Fen hoard, but is of yellower metal and differently patinated from the objects found with it. Canon Greenwell has a knife of the same form (4¾ inches), found at Seamer Carr, Yorkshire. Another, smaller (3⅜ inches), is in the British Museum, but its place of finding is not known. A nearly similar blade, found near Ballycastle, Co. Antrim, is shown in Fig. 257. Another example of this form (5⅜ inches) is in the British Museum. Sir W. Wilde[748] has figured some other examples of the same kind, from 3 to 4 inches long, which he regarded as arrow-heads. They appear to me, however, too large for such a purpose. In the Museum of the Royal Irish Academy is yet another variety, with the blade pierced in the centre (Fig. 258). [Illustration: Fig. 255.—Ballyclare. ½] [Illustration: Fig. 256.—Reach Fen. ½] [Illustration: Fig. 257.—Ballycastle. ½] [Illustration: Fig. 258.—Ireland. ½] Before proceeding to describe some other symmetrical double-edged blades, it will be well to notice such, few examples as have been found of single-edged blades, like the ordinary knives of the present day. Abundant as these are, not only in the Lake-dwellings of Switzerland, but in France and other continental countries, they are of extremely rare occurrence in the British Isles. In Fig. 259 I have engraved a small instrument of this kind, found at Wigginton, near Tring, Herts, the handle of which terminates in the head of an animal. It was therefore not intended for insertion into a haft of some other material. I have another bronze knife, rather longer and narrower, and with a pointed tang, which is said to have been found in London; but of this I am by no means certain. [Illustration: Fig. 259.—Wigginton. 1/1] The rude knife found with the Isle of Harty hoard, and shown full size as Fig. 260, is the only other English specimen with which I am acquainted, but no doubt more exist.