Great Britain, international law, and the evolution of maritime strategic thought, 1856-1914 : by Gabriela A. Frei, Oxford, Oxford University Press, 2020, vi+242 pp., £60 (Hbk), ISBN 9780198859932 : by Gabriela A. Frei, Oxford, Oxford University Press, 2020, vi+242 pp., £60 (Hbk), ISBN 9780198859932