Our chief movements inland may comprehensively be taken to lie within a region bounded by a radius of 50 miles around Delana on Hall Sound. On entering the unexplored region we found ourselves at first in a flat, swampy country, intersected by a few tiny creeks, some not more than two feet wide, running through grass. We next passed the eucalyptus belt and then came the forest proper, in which the trees were at first set in isolated patches. Undergrowth there was, but it did not attain any density, and at intervals we could trace the trails of the sandalwood cutter. Not long after leaving Oo-fa-fa we found a rocky eminence, from which we enjoyed a lovely view of the entire Bioto Creek winding between a dense border of mangroves, the vivid green of which marked the course of the inlet, even when the shimmer of the water in the sunlight was entirely veiled by the overhanging vegetation. Beyond lay the broader waters of Hall Sound, bounded by the wooded shores of Yule Island, and to the west we could descry Nicora, a small village on a hill of red clay. The vista was closed by the sea, and in the clear atmosphere the picture was one to be remembered. We then entered a flat tract, an apparent plateau, at a height of 1000 feet, and for a time travelling was over comparatively easy ground, but at Epa the forest and our difficulties began in earnest. Henceforward we had to depend on one or two trails very difficult to follow, and hills and valleys became continuous. Fifteen miles inland lay before us a line of rugged peaks, whither we were bound, but many more miles than fifteen would have to be covered before we reached them. Further off still towered Mount Yule, our first glimpse of the Papuan Alps. Passing Ekeikei we entered the region of ridges, often scarcely twelve inches wide, and affording only the most precarious foothold. The path as we rose became still more rugged, and was crossed by numerous creeks. Then the character of the forest changed, and we traversed damp and gloomy tracts, where the thick vegetation excluded the sunlight. The track at this point skirted vast and threatening precipices. At Madui we encountered peaty and spongy ground, thickly interwoven with roots, which impeded our progress and made the advance peculiarly toilsome, and the last stage to Dinawa was a long dip and a longer ascent. Once there, however, we were rewarded by a delightfully bracing climate and a glorious panorama of mountain scenery, a delight we often longed for at Mafalu, our furthest and highest point, where all view, save through an opening we ourselves cut in the trees, was denied us. Even that was generally obscured, so incessant was the rain and wetting mist. At favourable moments, however, we would see through our clearing the sunlight in the valley far below us, although we ourselves, dwelling as we did among the clouds, were denied that boon.