"So! so!" exclaimed Ludwig, with deep interest. "I must take another look at the engraving as soon as we get home."


At that same hour, while Ben was skating with his companions beside the Holland dike, Robby and Jenny stood in their pretty English schoolhouse, ready to join in the duties of their reading class.

"Commence! Master Robert Dobbs," said the teacher, "page 242. Now, sir, mind every stop."

And Robby, in a quick childish voice, roared forth at schoolroom pitch, "Lesson 62. The Hero of Haarlem. Many years ago, there lived in Haarlem, one of the principal cities of Holland, a sunny-haired boy of gentle disposition. His father was a sluicer, that is, a man whose business it was to open and close the sluices, or large oaken gates, that are placed at regular distances across the entrances of the canals, to regulate the amount of water that shall flow into them.

"The sluicer raises the gates more or less according to the quantity of water required, and closes them carefully at night, in order to avoid all possible danger of an oversupply running into the canal, or the water would soon overflow it and inundate the surrounding country. As a great portion of Holland is lower than the level of the sea, the waters are kept from flooding the land only by means of strong dikes, or barriers, and by means of these sluices, which are often strained to the utmost by the pressure of the rising tides. Even the little children in Holland know that constant watchfulness is required to keep the rivers and ocean from overwhelming the country, and that a moment's neglect of the sluicer's duty may bring ruin and death to all."