Eggerton Gold Field

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	the 850-ft. level, but of others extending southwards and upwards in lines pretty well parallel to that of the wing worked. Not only are there immense quantities of this series of wing quartz, but to the east and west of the line worked are many unsampled vertical formations, all of which are associated, more or less, with lines of gold-slate drainage. In fact, only one comparatively rich line of obstruction to the golden drainage of one belt of golden slate has received attention, and this attention was, as far as concerns its mining, of the crudest, for the efforts of the past have been directed to following and tearing out the richest parts of the line of obstruction, leaving many thousands of tons of quartz that would pay if handled in bulk. As a consequence of the varying amount of the displacements in connexion with the numerous breaks in the rock folds along the line of the lode country of Egerton (see Fig. 5), the line of the obstruction to the

	slate drainage, in the mined part in the Black Horse mine, pitches to the south at an angle from the horizontal of about 22°. The whole of the country along the line worked pitches, in my opinion, to the south. The general opinion among mining men, however, is that it pitches north, but I am inclined to think they have mistaken the pitch of the wing of quartz coming down north from the Rose workings as representing the pitch of the country. I have found, as a rule, that the general pitch of all such wing " makes " is at right angles, or thereabouts, to the pitch of their country. It was really from the 600 feet of the line of gold deposit of Egerton that the Black Horse Company obtained all its gold, the major part of its works to date being confined to it. I note that there was here less of a twist strain applied in producing the cracking of the corrugated rock beds, but the main line of drainage kept well to the slate country, and, as usual, between the squeezed-together arches. This line of drainage, which appears to be a continuation north of the west vertical from which the wing made out east in the Rose workings, shows here in narrow form, averaging in width about 4 inches, composed of laminated quartz containing mundic, but, as far as I could learn, no gold. In places, dyke material is associated with it, and this appears to have vied for position with quartz formations on its eastern side. Here, in the Black Horse area, the twist strain has resulted in forming receptacles for quartz formations of the wing order, but having the wings going down more nearly vertical. The nearer such wings were to the vertical lode, the richer in gold were they found to be. Thus the thin vertical lode

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