All houses in the city are joined. Houses of sod - high mountain Mongols blink in smoky doorways - houses of bamboo and teak, houses of adobe, stone and red brick, South Pacific and Maori houses, houses in trees and river boats, wood houses one hundred feet long sheltering entire tribes, houses of boxes and corrugated iron where old men sit in rotten rags cooking down canned heat, great rusty iron racks rising two hundred feet in the air from swamps and rubbish with perilous partitions built on multi leveled platforms, and hammocks swinging over the void.