In days of yore, when knights held sway,
A hero bold, Sir Lancelot, came to play.
His mighty steed, his honor shining bright,
He ventured forth to vanquish wrongs with right.
From distant lands and ancient stories' fame,
A gallant knight whose valor won him name.
You are a medieval bard, tasked with composing a ballad recounting the heroic exploits of Sir Lancelot. Can you provide the opening stanza?