During the advance of the Army that summer, it was alternatively with the 5th Division at the battle of Vittoria. The battery took part in the Siege of San Sebastian where Capt Johnson and a number of men from the unit were sent into the breach with the infantry in order to seize enemy artillery pieces. Capt Johnson's diary provides graphic details of this action. Lawson's Company – then equipped with 9-pounders – took part in the Passage of Bidassoa in October 1813, and in the battle of Nivelle. 2nd Captain Mosse was in command of the company when it repulsed the French attacks on 10 and 11 December. Captain Robert Lawson's Company, 8th Battalion Royal Artillery, left Spain on 22 July 1814 on board HMS Hydra bound for Plymouth.