The following is the entry for Courtenay Osburn Hayes in William O'Byrnes 1849 'Naval Biographical Dictionary'.
HAYES. (Captain, 1846.)Courtenay Osborn Hayes is eldest son of that distinguished seaman and able naval architect the late Rear-Admiral John Hayes, C.B., who died 7 April, 1838; brother of Commander John Montagu Hayes, R.N.; and nephew of Capt. Geo. Hayes, R.N.
This officer entered the Navy, 30 Nov. 1826; passed his examination in 1833; and obtained his first commission 17 Feb. 1835. His appointments as Lieutenant were – 13 April and 28 Nov., in the latter year to the Pelorus 16, Capt. Rich. Meredith, and Hastings 74, flag-ship of Sir Wm. Hall Gage, on the African and Lisbon stations – and, 2 Sept. 1836, to the Inconstant 36, Capts. John Hayes (his father), and Dan. Pring, employed on Particular Service. Attaining the rank of Commander 20 Sept. 1839, he afterwards, from 8 June, 1842, until the receipt of a Post commission bearing date 9 Nov. 1846, served in the East Indies on board the Wolf 18 and Driver steam-sloop.
Capt. Hayes married, 14 May, 1840, Caroline Anne, only daughter of the late Alfred Slocock, Esq., of Donnington Cottage, Berks, by whom he has issue. Agents – Messrs. Ommanney.