In June 1772, Montagu was involved in the Gaspee Affair as the commanding officer of Lieutenant William Duddingston, where he unsuccessfully tried to identify and have prosecuted the raiders who attacked Dudingston's ship.[3]
Montagu married Sophia Wroughton on 2 December 1748 and had one daughter and four sons. Of his sons, George and James became naval officers, while Edward became a lieutenant-colonel in the Royal Artillery. His daughter Sophia lived at Dale Park and the house there was constructed for her and her husband.[5]
^Jacob M. Price, 'Smith, John Abel (1802–1871)’, Oxford Dictionary of National Biography, Oxford University Press, 2004; online edn, Jan 2008 accessed 16 April 2017