. . . "HMS ''Impregnable''" . . . "79.248" . "Sold to break up, 18 February 1921" . . "Lord Howe" . . "HMS ''Howe''" . "HMS Howe (1860)" . . "''Impregnable''" . "1854-04-03" . "HMS Howe" . "18.542" . "HMS Howe (1860)" . . . "1860-03-07" . "Howe" . . . "1856-03-10" . . . .