 The foot were now besieged in Devizes but witnessed the destruction of Waller's forces at Roundway Down.The Western Royalists took Bath, and after joining Prince Rupert on 26 July 1643 they stormed Bristol.Slanning commanded one of the three tertia of the Western Army which attacked the South Eastern defences at 3.00 a.m. Bristol fell after some thirteen hours fighting, Slanning and Trevanion were both mortally wounded.