Jonas Moore

Jonas Moore (–1741) was an English army officer and military engineer in the British Army. Commissioned as probationer engineer in 1709, he was appointed sub-engineer at Gibraltar in 1711, chief engineer and commander-in-chief of the train of artillery at Gibraltar in 1720, and sub-director of engineers in 1722. He was distinguished at the Siege of Gibraltar in 1727. He was appointed chief engineer of the British expedition to Spanish America in 1740, and was mortally wounded in the attack on Carthagena.

Life Jonas Moore, probably grandson of Sir Jonas Moore the mathematician, received his commission as probationer engineer in October 1709. On 1 January 1711 he was appointed sub-engineer at Gibraltar and attached to David Colyear, 1st Earl of Portmore, the governor, for special service. According to Vetch, he was later sent to Port Mahon, Minorca, where he remained for some years, only returning to Gibraltar in August 1720.

Moore was chief engineer at Gibraltar during the siege by the Spaniards in 1727. The trenches were opened on 11 February, and the siege was not raised until 23 June. These have not been located since, and nor have upwards of twenty cartographical works by Moore listed in the ordnance office map room catalogue. Two of Moore's plans are now in the British Library.

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