The wind now blew from the northward, and in a short time we opened the Longships, bearing due south-west.  It had hitherto been hidden by the land, so that we knew perfectly well where we were.  We then kept away until we came in sight of the two lights of the Seven Stones Lightship, until we brought them on our starboard beam, when we were within the radius of Saint Agnes Lighthouse just before daybreak.