Let us imagine for a moment that the on-coming civilization of our country pushed the American Indians not westward but southward toward the Gulf of Mexico and along the banks of the Mississippi, and compressed them on every side until at last they were obliged to take to boats in the mouth of the Mississippi and live there perpetually, seldom stepping foot on land. Now we are the better able to understand exactly what took place with an aboriginal tribe in China. These aborigines were, centuries ago, pushed southward by an on-coming civilization until at last, by imperial decree, they were forbidden to live anywhere except on boats in the mouth of the Canton river, floating up and down that stream, and sailing about Hong Kong and Macao in the more open sea. They must have been always a hardy people, for the river population about Canton numbers today nearly 200,000 souls. In 1730, the severity of the laws regulating their lives was relaxed somewhat by imperial decree, and since then some of them have dwelt in villages along the river bank. But to the present day these people, known as the Tanka Tribe, or the "saltwater" people, by the natives, may not inter-marry with other Chinese, nor are they ever allowed to attain to official honors. Living always on boats near the river's mouth, these were the first Chinese to come in contact with foreign sailing vessels which approached China in the earliest days. They sold their wares to the foreigners; they piloted their boats into port; they did the laundry work for the ships. In many ways they showed friendliness to the foreigners while as yet the landsman viewed the new-comers with suspicion. Their women were grossly corrupted by contact with the foreign voyagers and sailors. Hong Kong was a long way off at the beginning of the nineteenth century, when Great Britain began to send Government-manufactured opium from India to China, and when China prohibited the trade the drug was smuggled in. When Chinese officials at last rose up to check this invasion by foreign trade, wars followed in which China was worsted, and the island of Hong Kong, together with the Kowloon peninsula, became a British possession as war indemnity. Hong Kong is a "mere dot in the ocean less than twenty-seven miles in circumference," and when Great Britain took possession its inhabitants were limited to "a few fishermen and cottagers."