Cheers Reg, I have been up to Ninestone a few times as used to visit Robin Hood Stride. We had friends at nearby Birchover.
Yes Arbor Low is well visited up here and also *Nine Ladies. Interesting that we (Derbyshire) would name two stone circles 'nine' when Ninestone has about four, possibly five and Nine Ladies has ten stones. Although Nine Ladies is representative of nine witches turned to stone, dancing to a pipe player ('The King Stone' as some may call it) in the centre. My late Granddad used to tell me on the Solstice the Witches rise again (he wasn't a devout Pagan), at 5/6 years old that was pretty scary!
Ninestone must've had nine at one point unless it referenced laylines too. I don't know as much about Ninestone and it isn't as well known. Beautiful parts of my County, I must admit.
*Nine Ladies is not a Derbyshire version of the fast food chain Five Guys
Nine ladies just sounds like a typical Friday night out for Reg.