Diving and Underwater Technology 1405–1830: a narrative bibliographyNIGELPHILLIPS 894 pp., 289 illustrations, many colour, privately published, 2018, UK £150, EU £168, rest of world £182, including postage (2 vols., hbk, order online at www.nigelphillips.com), ISBN 978‐1999677701.