I don't have the complete set. The complete set would have been 12 books. I have 11. That's okay - Remember I wasn't buying the books for worth - I was looking for something to go with my vintage cameras!! Their possible worth only came later. More to the point, I'm intrigued with the history of them. 242 years old - that's probably a lot of people who have handled them!
I've taken a photo of the text. Notice that where an 's' should be, the 'f' shows instead. Apparently this is the way s was written back then. The only time an 's' was used was at the beginning or end of the word. It looks very strange to us though.
The one thing I do notice is they have a lovely feel to them. Smooth, delicate and that old smell which of times past which I love so much.