It was decided to set the gun up at the foot of the Flagstaff, like a piece of artillery, and to fire it twice a year – once on October the twelfth, the anniversary of the Battle of the Cowshed, and once on Midsummer Day, the anniversary of the Rebellion.

George Orwell

Animal Farm. Chapter 4. This was Jones’s gun, which had been found lying in the mud after the battle.