Admiralty Chart No 1981 Approaches to Preston, Published 1951, Frederick William Beechey, 31 December 1951
Nautical chart of the approaches to preston. From the surveys of the port of preston harbour authority to 1950; outer soundings from the surveys of capt. F. W. Beechey, 1843, and staff commr. W. E. Archdeacon, 1882. Not current - not to be used for navigation! Date: 31 December 1951.