A beautiful very old woolwork picture

This wonderful woolwork picture has been cut down from a larger panel by the look if it. I think it dates to somewhere around 1750-1800, it is gently fade to muted colours over the years, with a charming couple dancing and making music. It is mostly worked in grospoint with petit point detail in wool. It is in super condition, all except for some missing stitches across the panel, if you look closely by clicking on the pics for a supersize image, it looks as though 1 colour wool has disintegrated throughout, most likely a brown or dark shade that may have been fixed with iron or something like that, which caused this particular wool to rot, leaving the rest intact!