'Tables of Mast-Head Angles for five feet intervals from 30 to 280 feet and varying distances from a cable's length to four miles with their application to Nautical Surveying'.
Printed book: 'Tables of Mast-Head Angles for five feet intervals from 30 to 280 feet and varying distances from a cable's length to four miles with their application to Nautical Surveying', Commander A B Becher, London, 1854