|Name||Cadmus (launched as Despatch, 1851)||Explanation|
|Launched||25 November 1851|
|Builders measure||483 tons|
|Note||1863 (= Cadmus) = WV.24, Coastguard|
|Extracts from the Times newspaper|
|Fr 23 September 1864||In accordance with instructions received at Chatham from the Admiralty, the whole of the smiths and joiners employed on the Achilles, ironclad frigate, and the Cadmus, 21, 400-horse power, commenced working extra hours yesterday, in order that both these vessels may be completed with as little delay as possible.|
Between 300 and 400 of the crew for the Achilles, 20, 1,250-horse power, Capt. E.W. Vansittart, have arrived at Chatham from the Steam Reserve at Portsmouth and Plymouth, and the remainder of the ship's complement will join that frigate in the course of the ensuing week. Yesterday the paddlewheel steamer Fearless, Master-Commander W. Taylor, tender to the Cumberland, 70, Capt. W.K. Hall, C.B., arrived at Chatham with a number of men, chiefly for the engineer department, for the Achilles. During the time the iron frigate is at Chatham her officers and crew are berthed on board the receiving ship Gloucester, 50, in Chatham harbour. Owing to the length of time the Achilles has been lying in the river her bottom has become exceedingly foul, and the examination of her hull by one of the professional divers has resulted in the discovery that the whole of her bottom is completely covered with marine insects, barnacles, and seaweed, some of the last being as much as two feet in length. The bottom of the Achilles, it may be remarked, was coated over with the Hay "anti-fouling" composition before the frigate was undocked, and as she has been lying some nine months in Chatham harbour, a pretty correct estimate may be formed of the state the bottoms of our ironclads will be in if detained only for a very short period in tropical waters. In the case of the Achilles, fully two knots an hour may be deducted from her speed if sent to sea in her present condition.