The article can be expanded with information from here:

http://www.shropshirerocks.org/shropshiregeologicaltrail/stapeleyhill/index.html?sid=zXqAb4utr9OMe0oOGhIJIZCt5AgGOhKD

and herE:

http://www.megalithic.co.uk/article.php?sid=11459