It is doubtful if any actual helm previous to the fourteenth century exists, and there are very few of that period remaining. In that of the Black Prince at Canterbury (Fig. 271) the lower, or cylindrical, portion is composed of a front and back piece, riveted together at the sides, and this was most likely the usual form of construction; but in the helm of Sir Richard Pembridge (Figs. 580 and 581) the three pieces (cylinder, conical piece, and top piece) of which it is formed are fixed with nails, and are so welded together that no trace of a join is visible. The edges of the metal, turned outwards round the ocularium, are very thick, and the bottom edge is rolled inwards over a thick wire, so as not to cut the surcoat. There are many twin holes in the helmet for the aiglets, by which the crest and lambrequin were attached, and in front, near the bottom, are two + shaped holes for the T bolt, which was fixed by a chain to the cuirass. The helm of Sir Richard Hawberk (Figs. 582 and 583), who died in 1417, is made of five pieces, and is very thick and heavy. It is much more like the later form adapted for jousting, and was probably only for use in the tilt-yard; but, although more firmly fixed to the cuirass than the earlier helm, it did not fit closely down to it, as all later helms did. Singularly few examples of the pot-helmet actually exist. The "Linz" example (Figs. 584 and 585), which is now in the {309} Francisco-Carolinum Museum at Linz, was dredged out of the Traun, and is unfortunately very much corroded by rust. The fastening-place for the crest, however, is well preserved. The example belongs to the first half of the fourteenth century. [Illustration: FIG. 580.] [Illustration: FIG. 581.] [Illustration: FIG. 582.] [Illustration: FIG. 583.] The so-called "Pranker-Helm" (Fig. 586), from the chapter of Seckau, now in the collection of armour in the Historical Court Museum at Vienna, and belonging to the middle of the fourteenth century, could only have been used for tournaments. It is made of four strong hammered sheets of iron 1-2 millimetres thick, with other strengthening plates laid on. The helmet by itself weighs 5 kilogrammes 357 grammes. {310} [Illustration: FIGS. 584 and 585.--The "Linz" Pot-Helmet.] [Illustration: FIG. 587.]