The Nipponese are maniacs for planning things out. Waterhouse knows this; he has been reading their decrypted messages twelve, eighteen hours a day for a couple of years now, he knows their minds. He knows, as surely as he knows how to play a D major scale, that the Nipponese must have given thought to this problem of backing their imperial currency—not just for Australia but New Zealand, New Guinea, the Philippines, Hong Kong, China, Indochina, Korea, Manchuria.