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Commander-in-chief of the Parliamentary army, occupied the city on 24 September 1642 and remained there for about a month before marching off to the Battle of Edgehill (23 October 1642).
The historian J.W. Willis-Bund gives contradictory information as to when Gerard ceased to be Governor of Worcester. On page 29 Willis-Bund writes that Gerard was governor until his death in 1645. On page 143 he states that at the beginning of 1645 Samuel Sandys became governor, but on page 173, he reports that Sir Gilbert Gerard led another party to Stourbridge and Kidderminster which J.M. Gratton places at the end of 1645. If one assumes that Willis-Bund misreported an Old Style January date in a primary source (he does not cite his source), and Sandys became governor in January 1646 (Rather than January 1645), then it does not contradict the information provided by J.M. Gratton (that the party Gerard led was in Kidderminster in late 1645) or R. Lomas, that Gerard was still the governor on 22 December 1645 (Lomas cites the contemporary diary of Elias Asmole).
Sandys was appointed Lieutenant-Governor of Worcester in 1644 (Rowlands 1983 cites W. H. Black, Docquets of Letters Patent, 281).
Green, Valentine (1796), "Appendix, Sieges and Battles Sect. XV No XLIV.", The history and antiquities of the city and suburbs of Worcester, Printed of the Author by Bulmer & Company and sold by G. Nicol bookseller to His Majesty, p. cliv
Lomas, Robert (2003), Freemasonry and the Birth of Modern Science, Gloucester, Mass: Fair Winds, pp. 143–144, ISBN9781592330119
Willis-Bund, John William (1905), The Civil War in Worcestershire 1642-1646 and the Scotch invasion of 1651, Simpkin, Marshall, Hamilton, Kent and Company, pp. 119–123
Further reading
Green, Valentine (1829). A concise history and description of the city and cathedral of Worcester. Vol. 2. London: Printed for the author by Bulmer and Company. p. 28. — Mentions William son of the Earl of Pembroke as governor at the time of Henry III
Vermeulen, Ann (3 March 2012). "Henry Washington, Sir (c.1615 - c.1664)". —Lists and quotes a collection of sources that can be used to build up a short biography of Sir Henry Washington.