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On 9 June 1803, he married Dorothy Hall Berry (7 October 1784 Jamaica – 18 March 1846), and they had 13 children. Notable amongst them were businessmen and politicians Thomas Berry Horsfall (1805–1878), Robert Horsfall (1807–1881) and George Henry Horsfall (1824–1900).
He was Bailiff in 1829 and then Mayor in 1832. He was an avid botanist, and his wife was a noted horticultural artist who contributed many plates to books and magazines of the time.
His botanical passions were fuelled by his business trade connections with West Africa, the West Indies and the Americas. He was in partnership with another notable merchant family, the Tobins and also his cousins the Hodgsons, Jamaican plantation owners.
In his honour his family, led by Robert Horsfall built Christ Church, Great Homer Street in Everton. It was consecrated on 30 October 1848 (Annals of Liverpool, page 1903) by the Bishop of Chester. According to the Liverpool Evening Express of 9 September 1948 , the cost of building was borne by the Horsfall family of Liverpool. Its patronage was vested in Trustees.
The church was destroyed by German bombing in the May blitz of 1941.