Join Geologist and New England’s foremost expert on stone walls, Robert Thorson, in a conversation on the fascinating history of Concord’s signature, but often forgotten, landform- stone walls on Wednesday, November 4, 7:00pm to 8:00pm. In this Concord Museum ForumThorson uncovers why New England is uniquely situated to be the quintessential landscape for stone walls and the work that communities like Concord, are doing to preserve them.