Thank you to everyone for the information that has been posted, it has let me find ancestors another generation or two back (including another Honour (which sounds odd to modern ears, but if we can have as names Faith and Hope, why not Charity and Honour?)), giving me some firm roots in Cornwall.
I will be heading back up the road to our town library in the next day or two to use their Ancestry subscription again. I’d like the 1851 census image for Honour mentioned above, and I’ll do some more spelunking trying to find William’s whereabouts in 1851. I had not previously considered military service.
I did stumble across one odd record on Ancestry yesterday: apparently Honour had a stay in a workhouse. I didn’t quite understand the reason, but it seemed like she was exhausted and didn’t have the resources to pay for lodging. I’m going to explore that a little further and see if there’s an entry for George as well, as I’d imagine they might have been traveling together.
Thanks again!
Edit: in case it’s of interest, the photo I’m using as my avatar is of my great-grandparents, George Stevens and Mary Fairlie, with their children George and Mary, my grandmother. This was taken in the US, and judging that my grandmother looks maybe three or four years old, probably from about 1914-15. George and Mary arrived as a newly married couple in January 1907.