Robert Wogdon, Wogdon & Barton, John Barton, London Gunmakers 1764-1819: John O'Sullivan and De Witt Bailey, Bonhams 1793 Ltd., London, 2019. 342 pp, with many illustrations, all in colour. Hard cover, pages 8.5 in (210mm) × 11.75 in (300mm). ISBN 978-1-5272-3740-7. Cost per copy, including postage and packing; UK £82.00; Europe £87.50; USA £90.50, and rest of the world, £95.00. For further information contact David Williams, Bonhams, Montpelier Street, London, SW7 1HH. (3rd July 2019) - Rimer, Graeme