Do you know the origin of "keep off the grass?"

http://www.britannica.com/event/Coxeys-Army

https://en.wikipedia.org/wiki/Coxey%27s_Army

So I was watching "Mysteries at the Museum" and they did an Episode on Coxey's Army, which was a protest on Unemployment and the condition of the Nation's Roads.

http://www.travelchannel.com/shows/mysteries-at-the-museum

Jacob Coxey was arrested at the Capitol on the charge of "walking on the grass."