Hi Baza,
I guess if you had info and/or pics of them both, this would help differentiate them...

You could always just put "The Hoar Stone at Steeple Barton (I)" and "The Hoar Stone at Steeple Barton (II)"

Or create a group called "Steeple Barton" and add them as sub-sites, calling them "The Hoar Stone (I)" and "The Hoar Stone (II)".

Cheerio
H.