Type G, the Hallstatt type, is so called because a few specimens were found in the famous cemetery at this place.[340] It would be a mistake, however, to consider it as having evolved in that region or dispersed from that centre. It seems more probable that, like the previous type, it developed in the mountain zone, and the evidence available at present suggests for its centre the upper reaches of the Danube, between Ulm and Sigmaringen;[341] but detailed work on the spot is needed before this can be determined with accuracy. Déchelette says that this type is generally distributed throughout Central Europe,[342] and this is true if we confine that term to the mountain zone, for it does not occur in Hungary. It is relatively rare in North Germany, two occur in Schleswig-Holstein,[343] a few in Scandinavia,[344] and one in Finland.[345] In France the greater number occur in Burgundy, in the valley of the Saone and down the Rhone Valley; also in the department of Lot on the upper waters of the Dordogne and in the departments of Indre and Cher. Several examples have been found in the Seine valley, in the neighbourhood of Paris,[346] a point to which I shall have to refer in a later chapter. In the British Isles nineteen have been found in the valley of the Thames below and including Reading, and six elsewhere near the east coast; twenty-four have been recorded from Ireland, of which twenty are in the National Museum in Dublin. This type is, then, found distributed fairly generally throughout the mountain zone of the Celtic cradle, and over many areas in Celtic lands, though it only occurs sparsely elsewhere. In the Mediterranean region it is entirely absent.[347] I have dealt at some length with these distributions, for there is no better way of interpreting archæological evidence and making it disclose, in broad outline at least, its historical content. Unfortunately no accurate catalogue of the swords discovered in most countries is in existence, though owing to the smallness of their numbers the lists are fairly complete for Italy and Greece. It would not be a very great undertaking to make an equally complete illustrated catalogue for the area included in the former empire of Austro-Hungary. In other regions the numbers are greater, and little has been done to catalogue them. The formation of an illustrated card catalogue of all the metal objects of the bronze age in the museums and private collections in the British Isles is in progress, under the auspices of a research committee appointed by the British Association for the advancement of Science. The specimens deposited in English collections have, for the most part, been already included in this catalogue, and it is from this that the bulk of the statistical matter relating to the British Isles has been derived.