"Many of these Dutch houses have these little mirrors fastened before the windows at such an angle that by merely looking in it from the inside, one may see who is at the front door," said his cousin; "and then, too, the ladies can sit by the window, sewing or reading, and can amuse themselves by watching what is going on in the street below, without troubling to look out of the window."

"I should hate to have to wear a dress like that," said Wilhelmina, looking at two young girls who were passing by. It did look strange, for one half of their dress was red and the other half black.

"They are the girls from the orphanage, and this is the uniform that they all must wear," said Mynheer Joost.

"Now Theodore must see some of the pictures of our great painters," he continued, as he led the young folks toward the splendid picture-gallery, where they strolled through what seemed to them miles of rooms and corridors, all hung with beautiful and valuable pictures, for little Holland has had some of the greatest artists the world has ever known, and some day, if you care about pictures,—and you certainly should,—you will want to go there and see them for yourself.

After this they did a great deal more sight-seeing, and Mynheer showed them the "Exchange," where the business of the city is carried on, and told them that there was one week in the year when the boys of Amsterdam were allowed to use the "Exchange" for a playground.

This was a reward for the good deed of some brave boys of long ago, when the Spaniards were plotting to capture the city. The boys, it seems, first discovered the secret, and went and informed the authorities, who were thus able to defend their city from attack.

"This," said Mynheer, "was the case when I was young, and I suppose the boys are still allowed the same privilege."

Our little folk were glad enough to take their seats on the deck of the little steamboat which was to take them to Alkmaar, the centre of the cheese-trade of North Holland.

"Whew! but we have done a lot of tramping about to-day; oh, my poor feet!" said Pieter, as he stretched himself out on a bench.