As soon as they were settled at the hotel, they went out for a stroll through the city, and to deliver letters to several gentlemen residing there. They had some trouble in finding the houses they were searching for, as the foreigners at Shanghai do not consider it aristocratic to have signs on their doors or gate-posts, and a good deal of inquiry is necessary for a stranger to make his way about. If a man puts out a sign, he is regarded as a tradesman, and unfit to associate with the great men of the place; but as long as there is no sign or placard about his premises he is a merchant, and his company is desirable, especially if he is free with his money. A tradesman cannot gain admission to the Shanghai Club, and the same is the rule at Hong-Kong and other ports throughout the East. But there is no bar to the membership of his clerk; and it not infrequently happens that a man will be refused admission to a club on account of his occupation, while his clerk will be found eligible. There are many senseless rules of society in the East, and our boys were greatly amused as the Doctor narrated them. [Illustration: SHANGHAI.] Shanghai is very prettily situated in a bend of the river, and the water-front is ornamented with a small park, which has a background of fine buildings. These buildings are handsome, and the most of them are large. Like the foreign residences at the treaty ports of Japan, they have a liberal allowance of ground, so that nearly every house fronting on the river has a neat yard or garden in front of it. The balconies are wide, and they are generally enclosed in lattice-work that allows a free circulation of air. Back from the water-front there are streets and squares for a long distance; and the farther you go from the river-front, the less do you find the foreign population, and the greater the Chinese one. The foreign quarter is divided into three sections--American, English, and French--and each has a front on the river in the order here given, but the subjects, or citizens, of each country are not confined to their own national quarter; several Americans live in the French and English sections, and there are French and English inhabitants in the quarter where the American consul has jurisdiction. There is generally the most complete harmony among the nationalities, and they are accustomed to make common cause in any dispute with the Chinese. Sometimes they fall out; but they very soon become aware that disputes will be to their disadvantage, and proceed to fall in again. There is a great deal of social activity at Shanghai, and a vast amount of visiting and dinner-giving goes on in the course of a year.