Masons

[Rsmyth]

This year marks the 150th anniversary of Masons in my hometown of Milford, PA. An article in the local paper gives a brief history of the secret organization and mentions that during the Civil War soldiers would assist other Masons even if they were on opposing sides. I guess a wounded soldier could give the secret sign until another Mason recognized him but has anyone ever heard of an example of North helping South or vice versa on account of them being Masons?
BTW - 15 years ago I was walking through a cemetery in Batavia, NY when I came across a monument erected to the demise of a former Mason in the 1800's who was hung by other Masons for giving away secrets of the society.