I'm listening to "Lucifer's Hammer" and more than once book mentions hand signals based on Kipling's books.
Something along the line of this: one person is manning a barricade, another man in a hide-out with a scoped rifle. And man on barricade meets people and depending on obscure hand signals rifle-man knows what is happening down there. In one case both hands were up - a signal to shoot the incoming party.
So the question is - what are the signals? Anywhere I can read about them? And what is the book by Kipling that explains these?
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