This paper is an account of the results of the excavation of a rock-shelter situated (Figure 1) on the southern side of a gully a few hundred yards north of the bridge over which the Great Western Road crosses the Western Railway Line. This gully is on the eastern slope of the Blue Mountains, and the rock-shelter, which faces northward, is at its lower end. Lapstone Creek flows down the gully to the river half a mile to the east. From various vantage points above the rock-shelter the aborigines had a wide view of the lowlands towards the river. Before the railway was constructed there was easy access from this gully to the Nepean River and Emu Plains. Nowadays a high railway embankment runs across the gully and shuts off completely the old way of access.