The beds where exposed show in most parts steep dips--in places standing almost vertically--but in how far these dips are uniform or the reverse, or in any way define a line of strike with anticlinals and synclinals, must be left for future close examination to ascertain. [Illustration: APPROXIMATE MAP OF THE KLONDIKE REGION] Great lumps of white or pinkish quartz, some of them _in situ_, others washed or rolled down the open slopes, occur at many points of some of the mountain elevations, indicating the presence of dikes and gash veins, and in part of interstratified beds containing this material. I found much of it at several "horizons" of the slope back of French Hill, and also as a cap overlying the badly cleaved and fragmented schists of the summit (three thousand feet?) of the prominent knob which dominates this region. The same type of "kidney" quartz appears at repeated intervals on the slope leading up to the Dome, almost immediately after leaving the junction of Carmack's Fork with the Bonanza, and also on the saddle ridge which might properly be considered to be a part of the summit of Dome Mountain. Prospectors have in nearly all cases staked these assumed outcrops of quartz, recognizing them as ledges, and in a number of them have claimed the discovery of the "mother lode." So far as visible gold is concerned, I have in nearly all cases found them to be absolutely barren, and I do not think at this time that there is much chance of finding anything materially valuable in them, although events might prove the reverse. Most of the quartz that has so far been discovered in direct association with the gold--that is to say, wrapped up with or within itself, as in the case of the quartz-gold nuggets of French Hill--is of a gray-blue or pinkish tint and of a granular and nonspathic type, therefore differing materially in aspect and structure from the quartz of the hillsides and from the greater number of the quartz bowlders that are contained in the dumps or have been removed from bed rock. Some of the bowlders or rolled pebbles containing coarse gold are of the same character of quartz as the quartz of the hillsides. Notably one such was shown to me as coming from a high-bench claim (Millett's) on Adams Hill (left "limit" [bank] of Bonanza, between Little Skookum and Adams Creek), and other similar fragments taken from the rock _in situ_ were observed on Gay Gulch and the ridge which separates the head waters of this stream from those of Eldorado. In a dump at the mouth of Gay Gulch (a right-hand tributary of Eldorado abreast of Claim 37) I found fragments of rotted quartz which were well sprinkled with fine gold.