The first stanza (of which Falstaff quotes the first line in Henry IV, Part 2) runs thus:
“When Arthur first in Court began,
And was approved King,
By Force of Arms great Victories won,
And conquest home did bring”.
The episode is from Malory.
Other ballads based on romances in the Collection of 1723 are: “St. George and the Dragon”, “The Seven Champions of Christendom”, “The London Prentice” and “Patient Grissel”.
The Percy Folio includes “King Arthur and the King of Cornwall”, “Sir Lancelott of Dulake”, “The Marriage of Sir Gawaine”, “Merline”, and “King Arthur’s Death”.