(*Footnote. Not less remarkable is the fact that the outlets or mouths of these stupendous and extensive valleys on each side, are extremely NARROW; as is evident on the general map of the colony. What can have become of the matter so scooped out? See Chapter 3.15 Volume 2.) ROADS AND ROCKS. The whole mass consists of a coarse, ferruginous sandstone, composed of angular or slightly worn grains of quartz cemented by oxide of iron. There is scarcely a patch of land along the line of road fit for cultivation. One solitary spot, rather better than the rest, has been wisely appropriated for an inn, and at a point very convenient for travellers, being about halfway across these mountains. This inn is about 2,800 feet above the sea, and the clouds and temperature give it the climate of England. Potatoes of an excellent quality grow there, also gooseberries; and a fire is as frequently agreeable as in the latitude of 52 degrees North. MOUNTS HAY AND TOMAH. The only summits which meet the traveller's eye above the common horizon are Mounts Hay and Tomah, situated about twelve miles northward of the road--the river Grose passing between them. These heights consist of trap-rock and grey porphyry, and like Warrawolong,* are crowned with lofty trees. (*Footnote. See above.) RIVER GROSE. Some idea may be formed of the intricate character of the mountain ravines in that neighbourhood from the difficulties experienced by the surveyors in endeavouring to obtain access to Mount Hay. EARLY ATTEMPTS TO TRACE IT UPWARDS. Mr. Dixon, in an unsuccessful attempt, penetrated to the valley of the Grose, until then unvisited by any European; and when he at length emerged from ravines in which he had been bewildered four days, without reaching Mount Hay, he thanked God (to use his own words in an official letter) that he had found his way out of them. (See the accompanying View of the Grose; also a general view of the sandstone territory, in Volume 2 Plate 38.)