On 18 March 1813 "Undaunted" chased a tartan under the battery of Carry-le-Rouet, about five leagues west of Marseille. Boats under the command of Lieutenant Aaron Tozer landed, and within a few minutes captured a battery mounting four 24-pounders, a 6-pounder field-gun, and a 13-inch mortar. The battery was destroyed and the tartan brought out, with a loss of two men killed and one wounded. On 18 August 1813 an attack was made upon Cassis, between Marseille and Toulon, by "Undaunted", the brig "Redwing", and the 16-gun brig-sloop , reinforced by boats from the ships , , and . Light winds meant that "Undaunted" could not take up her intended position, but "Redwing" and "Kite", in spite of fire from four batteries that protected the entrance of the bay, swept in, and took up positions to cover the marines as they captured the citadel by escalade, and drove the French out. The boats then entered the harbour, and captured three gun-boats and 24 merchant settees and tartans. Losses sustained by the British were four marines killed and 16 men wounded. In late 1813 Ussher was stationed by Sir Edward Pellew off Toulon with a small squadron under his orders to watch the movements of the French fleet. In April 1814 while off Marseille, and in company with , Captain Charles Napier, Ussher received a deputation, consisting of the mayor and civil authorities of the city, who informed him of the abdication of Bonaparte, and of the formation of a provisional government. He landed and there received orders from Lord Castlereagh in Paris, to prepare to convey Bonaparte to Elba. He embarked Bonaparte and his retinue on the evening of 28 April at Fréjus, arriving at Portoferraio on the evening of the 30th. On 3 May Bonaparte landed, and Ussher remained at Elba until the English transports which had brought Bonaparte's troops, horses, carriages, and baggage were cleared and sent to Genoa. Though requested by Bonaparte to prolong his stay, he also left. Ussher was then given command of the 74 on 29 June 1814, returning to England in her in August. In recognition of his services he was made a Companion of the Bath on 4 June 1815, and on 2 December was awarded a pension for his wounds of £250 per annum.