Not much I'm afraid
Described as a rather drab fly useful in low water. Sorry
The Lady Caroline spey fly is a traditional Atlantic Salmon fly whose roots appear to be more or less veiled in mystery. Its name derives from Lady Caroline Gordon-Lennox, who was the daughter of the Duke of Richmond and Gordon at Gordon Castle, Banffshire County, Bellie Fochabers Parish, Scotland.
Just up the road from where I live.