“It is Mynheer Jacobus,” said Tayoga, “and he wants us.”

Then he opened the door and the large red face of Mynheer Huysman looked into the room, which was illuminated by the moonlight.

“Come, you lads,” he said, in sharp, eager tones, “und bring your pistols with you.”

Robert and Tayoga snatched up their weapons, and followed him into the sitting-room, where the tall lank youth, Peter, stood.

“You know Peter,” he said, “und Peter knows you.  Now, listen to what he hass to tell, but first pledge me that you will say nothing of it until I give you leave.  Do you?”

“We do,” they replied together.

“Then, Peter, tell them what you haf seen, but be brief, because it may be that we must act quickly.”

“Obeying the instructions of Mynheer Jacobus Huysman, whom I serve,” said Peter, smoothly, evidently enjoying his importance of the moment, “I watched tonight the house of Mynheer Hendrik Martinus, who is not trusted by my master.  The building is large, and it stands on ground with much shrubbery that is now heavy with leaf.  So it was difficult to watch all the approaches to it, but I went about it continuously, hour after hour.  A half hour ago, I caught a glimpse of a man, strong, and, as well as I could tell in the night, of a dark complexion.  He was on the lawn, among the shrubbery, hiding a little while and then going on again.  He came to a side door of the house, but he did not knock, because there was no need.  The door opened of itself, and he went in.  Then the door closed of itself, and he did not come out again.  I waited ten minutes and then hurried to the one whom I serve with the news.”

Mynheer Jacobus turned to Tayoga and Robert.

“I haf long suspected,” he said, “that Hendrik Martinus iss a spy in the service of France, a traitor for his own profit, because he loves nothing but himself und his.  He has had remarkable prosperity of late, a prosperity for which no one can account, because he has had no increase of business.  Believing that a Frenchman wass here, a spy who wished to communicate with him, I set Peter to watch his house, und the result you know.”

“Then it is for us to go there and seize this spy,” said Robert.

“It iss what I wish,” said Mynheer Huysman, “und we may trap a traitor und a spy at the same time.  It is well to haf money if you haf it honestly, but Hendrik Martinus loves money too well.”

He took from a drawer a great double-barreled horse pistol, put it under his coat, and the four, quietly leaving the house, went toward that of Hendrik Martinus.  There was no light except that of the moon and, in the distance, they saw a watchman carrying a lantern and thumping upon the stones with a stout staff.

“It iss Andrius Tefft,” said Mynheer Jacobus.  “He hass a strong arm und a head with but little in it.  It would be best that he know nothing of this, or he would surely muddle it.”