[Illustration: PLATE I. Irish bronze celts in the order of their development. _p. 24._] Some of the earlier flat bronze celts may have been hafted like the stone celts, by merely fixing the smaller end into a stick with a thick head; but this method must soon have been abandoned, as after a certain number of blows had been delivered, the axe-head would be forced back into the shaft. A more practical method was to place the head in a handle having a forked head, and the origin of the stop-ridge was to prevent the two sides coming down too low on to the blade. The side flanges and palstave-form developed naturally from this. The manner of hafting the socketed celts is well shown by a handled socketed celt found at Edenderry, King's Co., and formerly in the Murray collection. This object is now in the Ethnological and Archaeological Museum at Cambridge; and it is to be regretted that so rare and important a find should have left the country. [Illustration: Fig. 17.--Ornamented Bronze Celts.] Some of the flat bronze celts are very finely decorated with incised chevrons, triangles, cross-hatchings, and other Bronze-Age linear ornament. One example has a kind of herring-bone pattern, somewhat resembling the well-known leaf-marking at New Grange. Some examples show a kind of cable-pattern on the side flanges; and the size of a few specimens is remarkable. A flat celt, with a remarkable ornamentation from the Greenwell collection found near Connor, County Antrim, is figured by Sir John Evans, _op. cit._, p. 64. It has a border of chevrons along the edge of the side; and this is carried across the celt in the centre and at the commencement of the cutting-edge. This border is joined by a similar centre band of ornament. Several of the Irish palstaves have a shield-shaped ornament below the stop-ridge. The socketed celts are, as a rule, unornamented; but there are a few which have been found in Ireland which are ornamented with ribs ending in pellets. [Illustration: Fig. 18.--Ornamented Bronze Celts.] The question is often asked as to whether the bronze celts were used as weapons or tools; and the probability is that they were used as either as occasion demanded. The celts do not show any marked difference of type which would enable us to differentiate a weapon from a tool, as is possible in the later iron axes of the Norman and Danish period when we can distinguish a heavy axe and a lighter keen blade. The Bayeux tapestry shows the two types in use, the heavy type being used to fell trees and the lighter for fighting.