Since the aforesaid Gulielmus Mascabeles far surpassed him in wealth and influence, Robert renounced all idea of meeting him openly in battle, and concocted a wicked plot instead. For, while professing friendship and feigning repentance, he was secretly preparing a terrible scheme, which was hard to detect, in order to capture all Mascabeles’ towns, and make himself master of all his possessions. As a start he opened negotiations for peace, and sent an embassy to ask Gulielmus to come in person to a conference. Gulielmus welcomed peace with Robert, because he was extremely fond of his daughter, and fixed a meeting for the morrow; and Robert indicated the place where they would meet for discussion, and arranging a truce with each other.
In this place were two peaked hills rising from the plain to equal height, and standing diametrically opposite each other; the intervening ground was swampy, and over-grown with all manner of trees and bushes. On this ground that crafty Robert planted an ambuscade of four very brave armed men, and adjured them to keep careful watch all round, and as soon as they saw him at grips with Gulielmus, to run up against the latter without an instant’s delay. After these preliminary preparations, Robert, the arch-schemer, forsook the hill which he had designated beforehand for the conference with Mascabeles, and appropriated, so to say, the second hill, and taking fifteen horsemen and about fifty-six foot-soldiers up with him, posted them there, and then disclosed his whole plot to the more important among them.
He also commanded one to hold his armour ready for him to put on quickly, namely, his helmet, shield, and short sword; to the four men in ambush he had given injunctions to rush very quickly to his aid directly they saw Mascabeles at grips with him. On the appointed day Gulielmus was coming to the hill to the spot which Robert had indicated to him beforehand, with the intention of completing a treaty; when Robert saw him drawing near, he met him on horseback, and embraced and welcomed him right heartily. So they both halted on the slope, a little distance from the summit of the hill, talking of what they meant to do.
The crafty Robert wasted the time by talking of one subject after another, and then said to Gulielmus: “Why in the world should we tire ourselves by sitting on horseback? Why not dismount, and sit on the ground, and talk freely of the necessary matters?” Mascabeles foolishly obeyed, all unaware of the guile, and the danger into which he was being led, and when he saw Robert get on his horse, he dismounted too, and resting his elbow on the ground, started the discussion afresh. Robert now professed fealty to Mascabeles for the future, and called him his faithful benefactor and lord.
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