A Naval Biographical Dictionary/Mackenzie, John Francis Campbell
MACKENZIE. (Lieutenant, 1846.)
John Francis Campbell Mackenzie passed his examination 30 Aug. 1841; was employed for a few months in 1843 on particular service in the Thunderer 84, Capt. Daniel Pring; then became attached for a period of two years to the Excellent gunnery-ship at Portsmouth, Capts. Sir Thos. Hastings and Henry Ducie Chads; and after having further served for a short time in the Queen 110, bearing the flag of Sir John West at Devonport, was awarded a commission dated 26 June, 1846. He has been borne as Additional-Lieutenant, since 9 April, 1847, on the books of the Vindictive 50, flag-ship in North America and the West Indies of Sir Fras. Wm. Austen.