This was nothing like Tokyo, where the past, all that remained of it, was nurtured with a nervous care. History there had become a quantity, a rare thing, parceled out by government and preserved by law and corporate funding. Here it seemed the very fabric of things, as if the city were a single growth of stone and brick, uncounted strata of message and meaning, age upon age, generated over the centuries to the dictates of some now-all-but-unreadable DNA of commerce and empire.