Here’s what Stan Beckensall has to say about the stone.
“At Homildon Hill, below the Cheviots, on the way to Coldstream from Wooler is the site of a lesser battle in 1402 between the old enemies Percy and Douglas, traditionally marked by a standing stone to the east of the road that in fact marks the site of a prehistoric burial.
Shakespear begins the first part of Henry IV with this battle where the protagonists ‘did spend a sad and bloody hour’.”
Taken from
Northumberland, The Power of Place
Stan Beckensall
Tempus Books
2001
I took a new photo of this the other day. You can see it at:
flickr.com/photos/borderglider/2330236767/
Incidentally the nearest town is Wooler - 2 miles away. Coldstream is a good 12 miles away.