A portion of the way took our friends through the grounds of some of the castles, and the boys were rather astonished at the extent of these residences of princes. Doctor Bronson explained that Tokio was formerly a city of princes, and that the residences of the Daimios, as these great men were called, were of more consequence at one time than all the rest of the city. The palace of a Daimio was known as a _yashiki_, and the yashikis were capable, in some instances, of lodging five or ten thousand men. Under the present government the power of the princes has been taken away, and their troops of retainers have been disbanded. The government has converted the most of the yashikis into offices and barracks and schools, and one at least has been turned into a manufactory. The original plan of Tokio was that of a vast camp, and from that the city grew into its present condition. The best locations were occupied by the castles and yashikis, and the principal castle in the centre has the best place of all. Frank observed as they crossed the bridge leading into the castle-yard that the broad moat was full of lotos flowers in full bloom, and he longed to gather some of them so that he might send them home as a souvenir of the country. He had heard of the lotos as a sort of water-lily, similar in general appearance to the pond-lily of his native land. He was surprised to find a flower, eight or ten inches in diameter, growing on a strong stalk that did not float on the water, but held itself erect and far above it. The Doctor explained the matter by telling him that the Japanese lotos is unlike the Egyptian lotos, from which our ideas of that flower are derived. But the Japanese one is highly prized by the people of all ranks and classes, and it grows in abundance in all the castle-moats, and in marshy ground generally. [Illustration: TOO MUCH SA-KEE.]