drawn from an Actual Survey now lying at the Admiralty Office, and made between the Years 1737 & 1744 by Order and Encouragement of the Lords of the Admiralty.
By Lewis Morris.
By comparing this Chart with all that have been done before, it will be found that there are here laid down, several Banks, Overfalls, sunken rocks & other Material discoveries of dangers, which hitherto have been known only to a few Coasters; the Principal of which are the Coal rock, y Garreg goch hen, several banks about Bardsey, also Sarn Badrig, Sarn Gynfelyn, the Auger bank, Porgus bank &c., the knowledge of which & this publication cannot but be of the Utmost Consequence to trade & Navigation.