Now, the door of the Patchwork School was of a very peculiar structure.  It was made of iron of a great thickness, and opened like any safe door, only it had more magic about it than any safe door ever had.  At a certain hour in the afternoon, it shut of its own accord, and opened at a certain hour in the morning, when the Patchwork Woman repeated a formula before it.  The formula did no good whatever at any other time; the door was so constructed that not even its inventor could open it after it shut at the certain hour of the afternoon, before the certain hour the next morning.

Now the Mayor and the Chinese Ambassador had staid rather longer than they should have.  They had been so interested in the school that they had not noticed how the time was going, and the Patchwork Woman had been so taken up with a very intricate new pattern that she failed to remind them, as was her custom.

So it happened that while the Mayor got through the iron door safely, just as the Chinese Ambassador was following it suddenly swung to, and shut in his braided queue at a very high point.

[Illustration:  JULIA ENTERTAINS THE AMBASSADOR THROUGH THE KEYHOLE.]

Then there was the Ambassador on one side of the door, and his queue on the other, and the door could not possibly be opened before morning.  Here was a terrible dilemma!  What was to be done?  There stood the children, their patchwork in their hands, staring, open-mouthed, at the queue dangling through the door, and the Patchwork Woman pale with dismay, in their midst, on one side of the door, and on the other side was the terror-stricken Mayor, and the poor Chinese Ambassador.

“Can’t anything be done?” shouted the Mayor through the keyhole—­there was a very large keyhole.

“No,” the Patchwork Woman said.  “The door won’t open till six o’clock to-morrow morning.”

“Oh, try!” groaned the Mayor.  “Say the formula.”

She said the formula, to satisfy them, but the door staid firmly shut.  Evidently the Chinese Ambassador would have to stay where he was until morning, unless he had the Mayor snip his queue off, which was not to be thought of.

So the Mayor, who was something of a philosopher, set about accommodating himself, or rather his friend, to the situation.

“It is inevitable,” said he to the Ambassador.  “I am very sorry, but everybody has to conform to the customs of the institutions of the countries which they visit.  I will go and get you some dinner, and an extra coat.  I will keep you company through the night, and morning will come before you know it.”

“Well,” sighed the Chinese Ambassador, standing on tiptoe so his queue should not pull so hard.  He was a patient man, but after he had eaten his dinner the time seemed terrible long.

“Why don’t you talk?” said he to the Mayor, who was dozing beside him in an easy-chair.  “Can’t you tell me a story?”

“I never did such a thing in my life,” replied the Mayor, rousing himself; “but I am very sorry for you, dear sir; perhaps the Patchwork Woman can.”