Henry De Saumarez

An Account of the Proceedings of Henry de Saumarez, of the Island of Guernesey, Gent. Concerning His Discovery of an Invention, by Which the Course of a Ship at Sea May Be Better Ascertained Than by  Henry De Saumarez Hardback. Gale Ecco, Print Editions, 2018-04-22 ISBN 9781385165140     A Letter to a Friend, Setting Forth the Case of the Author of the Marine Surveyor. Being an Instrument Design'd for the Improvement of Navigation, and for Correcting Many Errors in That Useful Art  Henry De Saumarez Hardback. Gale Ecco, Print Editions, 2018-04-23 ISBN 9781385380659     A Letter to a Friend, Setting Forth the Case of the Author of the Marine Surveyor. Being an Instrument Design'd for the Improvement of Navigation, and for Correcting Many Errors in That Useful Art  Henry De Saumarez Paperback. Gale Ecco, Print Editions, 2010-06-10 ISBN 9781170835883     An Account of the Proceedings of Henry de Saumarez, of the Island of Guernesey, Gent. Concerning His Discovery of an Invention, by Which the Course of a Ship at Sea May Be Better Ascertained Than by  Henry De Saumarez Paperback. Gale Ecco, Print Editions, 2010-06-09 ISBN 9781170092842