The yarra grew here, as on the Darling, to a gigantic size, the height sometimes exceeding 100 feet; and its huge gnarled trunks, wild romantic-formed branches often twisting in coils, shining white or light red bark, and dark masses of foliage, with consequent streaks of shadow below, frequently produced effects fully equal to the wildest forest scenery of Ruysdael or Waterloo. Often as I hurried along did I take my last look with reluctance of scenes forming the most captivating studies. The yarra is certainly a pleasing object in various respects; its shining bark and lofty height inform the traveller of a distant probability of water, or at least of the bed of a river or lake; and being visible over all other trees it usually marks the course of rivers so well that, in travelling along the Darling and Lachlan, I could with ease trace the general course of the river without approaching its banks until I wished to encamp. The nature and character of several other species of the genus eucalyptus were nevertheless very different and peculiar. The small kind, covered with a rough bark and never exceeding the size of fruit trees in an orchard and called, I believe, by Mr. Oxley, the dwarf-box, but by the natives goborro, grows only on plains subject to inundation, and it usually bears on the lower part of the trunk the mark of the water by which it is at times surrounded. Between the goborro and the yarra there seems this difference: the yarra grows only on the banks of rivers, lakes, or ponds, from the water of which the roots derive nourishment; but when the trunk itself has been too long immersed the tree dies; as appeared on various lakes and in reedy swamps on the Lachlan. The goborro on the contrary seldom grows on the banks of a running stream, but seems to thrive in inundations, however long their duration. Mr. Oxley remarked during his wet journey that there was always water where these trees grew. We found them in most cases during a dry season, a sure indication that none was to be discovered near them. It may be observed however that all permanent waters are invariably surrounded by the yarra. These peculiarities we ascertained only after examining many a hopeless hollow where grew the goborro by itself; nor until I had found my sable guides eagerly scanning the yarra from afar when in search of water, and condemning any distant view of goborro trees as hopeless during that dry season. In describing the trees which ornamented the river scenery I must not omit to mention a long-leaved acacia whose dark stems and sombre foliage, drooping over the bank, presented a striking and pleasing contrast to the yarra trunks, and the light soil of the water-worn banks. The bimbel (or spear-wood) which grows on dry forest land, the pine-like Callitris pyramidalis on red sandhills, and a variety of acacias in the scrubs, generally present groups of the most picturesque description. RETURN TO THE PARTY. April 26.