|Name||Acheron (launched as Northumberland, 1866)||Explanation|
|Type||Broadside ironclad frigate|
|Launched||17 April 1866|
|Builders measure||6621 tons|
|Ships book||ADM 135/330|
1904 = Acheron, t.s.
1909 = C.8 hulk.
1926 = C.68.
Resold as hulk Stedmound
|Snippets concerning this vessels career|
|13 August 1868|
- 24 March 1869
|Commanded by Captain Roderick Dew, Channel squadron (until Dew died)|
|2 October 1873|
- 28 July 1875
|Commanded by Captain Thomas Bridgeman Lethbridge, flagship of Rear-Admiral George Hancock, then Rear-Admiral Lord John Hay, second in command, Channel squadron|
|31 December 1880||Commanded by Captain George Stanley Bosanquet, and during 1882 Egyptian war|