The captain delighted Ben by saying that the monument was there and that he thought they might be able to see it during the day.

"Lambert," continued Peter, "ask Ben if he saw Van der Werf's portrait at the town hall last night?"

"No," said Lambert, "I can answer for him. It was too late to go in. I say, boys, it is really wonderful how much Ben knows. Why, he has told me a volume of Dutch history already. I'll wager he has the siege of Leyden at his tongue's end."

"His tongue must burn, then," interposed Ludwig, "for if Bilderdyk's account is true, it was a pretty hot affair."

Ben was looking at them with an inquiring smile.

"We are speaking of the siege of Leyden," explained Lambert.

"Oh, yes," said Ben, eagerly, "I had forgotten all about it. This was the very place. Let's give old Van der Werf three cheers. Hur--"

Van Mounen uttered a hasty "Hush!" and explained that, patriotic as the Dutch were, the police would soon have something to say if a party of boys cheered in the street at midday.