"'See! where on yon cliff Zamora
Lifteth up her haughty brow;
Walls of strength on high begird her,
Duero swift and deep below.'"
Ancient Spanish Ballads (Lockhart's tr.).

The king, utterly regardless of the Cid's openly expressed opinion that it was unworthy of a knight to attempt to deprive a woman of her inheritance, now bade him carry a message to Doña Urraca, summoning her to surrender at once. The hero went reluctantly, but only to be bitterly reproached by Urraca. She dismissed him after consulting her assembled people, who vowed to die ere they would surrender.

"Then did swear all her brave vassals
In Zamora's walls to die,
Ere unto the king they'd yield it,
And disgrace their chivalry."
Ancient Spanish Ballads (Lockhart's tr.).

[Sidenote: Siege of Zamora.] This message so enraged Don Sancho that he banished the Cid. The latter departed for Toledo, whence he was soon recalled, however, for his monarch could do nothing without him. Thus restored to favor, the Cid began the siege of Zamora, which lasted so long that the inhabitants began to suffer all the pangs of famine.

At last a Zamoran by the name of Vellido (Bellido) Dolfos came out of the town in secret, and, under pretense of betraying the city into Don Sancho's hands, obtained a private interview with him. Dolfos availed himself of this opportunity to murder the king, and rushed back to the city before the crime was discovered. He entered the gates just in time to escape from the Cid, who had mounted hastily, without spurs, and thus could not urge Babieça on to his utmost speed and overtake the murderer.

"'Cursed be the wretch! and cursed
He who mounteth without spur!
Had I arm'd my heels with rowels,
I had slain the treacherous cur.'"
Ancient Spanish Ballads (Lockhart's tr.).

The grief in the camp at the violent death of the king was very great. Don Diego Ordoñez immediately sent a challenge to Don Arìas Gonzalo, who, while accepting the combat for his son, swore that none of the Zamorans knew of the dastardly deed, which Dolfos alone had planned.

"'Fire consume us, Count Gonzalo,
If in this we guilty be!
None of us within Zamora
Of this deed had privity.

"'Dolfos only is the traitor;
None but he the king did slay.
Thou canst safely go to battle,
God will be thy shield and stay.'"
Ancient Spanish Ballads (Lockhart's tr.).

This oath was confirmed by the outcome of the duel, and none of the besiegers ever again ventured to doubt the honor of the Zamorans.