Littlestone wrote about ‘Stones in the Road’ in 2010 here - http://www.themodernantiquarian.com/user/4131/weblog/ with some photos of the same article here - https://theheritagetrust.wordpress.com/2013/02/07/stones-in-the-road-like-diamonds-in-the-dust/

And I've just noticed that the Pump featured the Soulbury stone a few days back!