PICKET LINE • E-FREE TRANSLATION.COM • Definition of Picket line

... wrong in the surprise. There we had been waiting for one of those early fogs, and at last the fog had come. And Jubal Early had, that morning, pushed out every man he had, that could stand; and they lay hid for three mortal hours, within I don't know how near the picket line at Fort Powhatan, only waiting for the shot which John Streight's party were to fire at Wilson's Wharf, as soon as somebody on our left centre advanced in force on the enemy's line above Turkey Island ...

— If, Yes and Perhaps - Four Possibilities and Six Exaggerations with Some Bits of Fact • Edward Everett Hale

... departure most secret, for it was evident that if the English heard that I had been detached from the army they would naturally conclude that something important was about to happen. My horse was taken, therefore, beyond the picket line, as if for watering, and I followed and mounted him there. I had a map, a compass, and a paper of instructions from the Marshal, and with these in the bosom of my tunic and my sabre at my side, I ...

— The Great Shadow and Other Napoleonic Tales • Arthur Conan Doyle