Winding into the hills, it came to the summit and a short tunnel immediately after which was situated Fernleigh Loop. Between Adamstown and the tunnel, an attempt had been made to duplicate the line and the derelict works could still be seen to the left of the line in 1940. Fernleigh Loop had Down and Up loops, one on each side of the main line. The lines here were on a sharp curve. There was no passenger platform, the only building being the signal box.