men of Zamora when they heard this had great sorrow, because they had endured the siege so long, and must now give up the town at last; and they determined all to go with the Infanta, and not remain in the town. XXVIII. When Vellido Dolfos heard this, he went to Doña Urraca and said, Lady, I came here to Zamora to do you service with thirty knights, all well accoutred, as you know; and I have served you long time, and never have I had from you guerdon for my service, though I have demanded it: but now if you will grant my demand I will relieve Zamora, and make King Don Sancho break up the siege. Then said Doña Urraca, Vellido, I shall repeat to thee the saying of the wise man, A man bargains well with the slothful and with him who is in need; and thus you would deal with me. I do not bid thee commit any evil thing, if such thou hast in thy thought; but I say unto you, that there is not a man in the world to whom if he should relieve Zamora, and make the King my brother raise the siege, I would not grant whatsoever he might require. And when Vellido heard this he kissed her hand, and went to a porter who kept one of the gates of the town, and spake with him, saying, that he should open the gate unto him when he saw him flying toward it, and he gave him his cloak. Then went he to his lodging and armed himself, and mounted his horse, and rode to the house of Don Arias Gonzalo, and cried with a loud voice, We all know the reason, Don Arias Gonzalo, why you will not let Doña Urraca exchange Zamora with her brother; it is because you deal with her as a harlot, like an old traitor. When Arias Gonzalo heard this, it grieved him to the heart, and he said, In an evil day was I born, that so shameful a falsehood as this should be said to me in mine old age, and there should be none to revenge me! Then his sons arose and armed themselves hastily, and went after Vellido, who fled before them toward the gate of the town. The porter when he saw him coming opened the gate, and he rode out and galloped into the camp of the King Don Sancho, and the others followed him till they were nigh the camp, but farther they did not venture. And Vellido went to the King and kissed his hand, and said unto him these false words with a lying tongue: Sir, because I said to the Council of Zamora that they should yield the town unto you, the sons of Arias Gonzalo would have slain me, even as you have seen. And therefore come I to you, Sir, and will be your vassal, if I may find favour at your hands. And I will show you how in a few days you may have Zamora, if God pleases; and if I do not as I have said, then let me be slain. And the King believed all that he said, and received him for his vassal, and did him great honour. And all that night they talked together of his secrets, and he made the King believe that he knew a postern by means of which he would put Zamora into his hands.