From the tops of the hills the travelers caught their first glimpse of the wonderful cities of Twi. Two walls surrounded the cities, and in the walls were two gates just alike. Within the inclosures stood many houses, but all were built in pairs, from the poorest huts to the most splendid palaces. Every street was double, the pavements running side by side. There were two lamp-posts on every corner, and in the dim twilight that existed these lamp-posts were quite necessary. If there were trees or bushes anywhere, they invariably grew in pairs, and if a branch was broken on one it was sure to be broken on the other, and dead leaves fell from both trees at identically the same moment.  
Much of this Marvel and Nerle learned after they had entered the cities, but the view from the hills showed plainly enough that the "double" plan existed everywhere and in every way in this strange land.
 
They followed the paths down to the gates of the walls, where two pairs of soldiers rushed out and seized their horses by the bridles. These soldiers all seemed to be twins, or at least mates, and each one of each pair was as like the other as are two peas growing in the same pod. If one had a red nose the other's was red in the same degree, and the soldiers that held the bridles of Nerle's horse both had their left eyes bruised and blackened, as from a blow of the same force.
 
These soldiers, as they looked upon Nerle and the prince, seemed fully as much astonished and certainly more frightened than their prisoners. They were dressed in bright yellow uniforms with green buttons, and the soldiers who had arrested the prince had both torn their left coat-sleeves and had patches of the same shape upon the seats of their trousers.
 
"How dare you stop us, fellows?" asked the prince, sternly.
 
The soldiers holding his horse both turned and looked inquiringly at the soldiers holding Nerle's horse; and these turned to look at a double captain who came out of two doors in the wall and walked up to them.
 
"Such things were never before heard of!" said the two captains, their startled eyes fixed upon the prisoners. "We must take them to the Ki and the Ki-Ki."
 
"Why so?" asked Prince Marvel.
 
"Because," replied the officers, "they are our rulers, under grace of the High Ki, and all unusual happenings must be brought to their notice. It is our law, you know--the law of the Kingdom of Twi."
 
"Very well," said Marvel, quietly; "take us where you will; but if any harm is intended us you will be made to regret it."
 
"The Ki and the Ki-Ki will decide," returned the captains gravely, their words sounding at the same instant.
 
And then the two pairs of soldiers led the horses through the double streets, the captains marching ahead with drawn swords, and crowds of twin men and twin women coming from the double doors of the double houses to gaze upon the strange sight of men and horses who were not double.
 
Presently they came upon a twin palace with twin turrets rising high into the air; and before the twin doors the prisoners dismounted. Marvel was escorted through one door and Nerle through another, and then they saw each other going down a double hallway to a room with a double entrance.
 
Passing through this they found themselves in a large hall with two domes set side by side in the roof. The domes were formed of stained glass, and the walls of the hall were ornamented by pictures in pairs, each pair showing identically the same scenes. This, was, of course, reasonable enough in such a land, where two people would always look at two pictures at the same time and admire them in the same way with the same thoughts.
 
Beneath one of the domes stood a double throne, on which sat the Ki of Twi--a pair of gray-bearded and bald-headed men who were lean and lank and stoop-shouldered. They had small eyes, black and flashing, long hooked noses, great pointed ears, and they were smoking two pipes from which the smoke curled in exactly the same circles and clouds.
 
Beneath the other dome sat the Ki-Ki of Twi, also on double thrones, similar to those of the Ki. The Ki-Ki were two young men, and had golden hair combed over their brows and "banged" straight across; and their eyes were blue and mild in expression, and their cheeks pink and soft. The Ki-Ki were playing softly upon a pair of musical instruments that resembled mandolins, and they were evidently trying to learn a new piece of music, for when one Ki-Ki struck a false note the other Ki-Ki struck the same false note at the same time, and the same expression of annoyance came over the two faces at the same moment.
 
When the prisoners entered, the pairs of captains and soldiers bowed low to the two pairs of rulers, and the Ki exclaimed--both in the same voice of surprise:
 
"Great Kika-koo! what have we here?"
 
"Most wonderful prisoners, your Highnesses," answered the captains. "We found t............