Don't try to stuff a pillow into your helmet; it only spoils your appearance and gives the show away.
Don't "pick up" anything with the broad arrow on it.
Don't steal a horse from the Club railings when its owner is having a whisky and soda; it is distinctly dangerous.
Don't "steal" a horse at all, but let it "wander into your lines."
Don't drive a flock of sheep across the pond of the Headquarter Staff; they might delay the Commander-in-Chief and make him angry.
Don't wear a bunch of false hair in your hat; it was never served out to you.
Don't carry ladies' silk stockings in your wallets; they won't fit you.
Don't shout out in camp, "Who's stolen my silk umbrella?" People might ask you where you got it from.
Don't avoid ostentatiously the Provost Marshal as he rides along; greet him kindly and openly and perhaps he will not suspect you.