== Swiftsure == 

 John: Thanks for that. I am working through in chronological order, so will get up to 1870 over the next couple of weeks. There were, as I would give long odds you know, several HMS Swiftsures. What a shame that the author of the article you found didn't know that! 
 It's a fun project, and as a new Wikipedian I am pleased to have found a major gap that I can fill.