You had me worried that I'd given the wrong grid ref there :-)
The numbers of rocks within 1km doesn't surprise me, but there are several named stones – the Badger Stone and Barmishaw Stone are about 100 metres south and north respectively. Then there are the Silver Wells, Weary Hill, Willy Hall's Wood, Neb and Pepperpot all within 1km. When I first posted that site I should have just included it with the main Rombald's Moor page I suppose instead of adding it as a separate site and 'Unknown Stone' made it sound like it was a fresh discovery – which of course it wasn't, 'Unnamed Stone' or the site reference number would have been better.
Incidentally, the book that Greywether mentions in his photo of the stone – The Prehistoric Rock Art of the West Riding' is well worth getting hold of for anybody with an interest in the area.
-Chris