. . . "HMS Impregnable (1810)" . "''Impregnable''" . . "HMS ''Caledonia''" . . "HMS Impregnable (1810)" . "Sold, 1906" . "HMS ''Impregnable''" . . "15.5448" . . . . . . "Impregnable" . . "1810-08-01" . "HMS ''Kent''" . . . "60.0456" . "1798-01-13" .