"Xualla" is placed to the west of and near the headwaters of the "secco" or Savannah River.
This work is not a true fresco, but a secco—that is, it was painted on the dry wall.
The musical element consisted of a succession of arias and duets stitched together by a loose thread of secco recitative.
In fresco painting no vehicle was used but water; in secco painting a tempera was used composed of white and yolk of egg.
secco had an especial province of its own; all pictures, as distinguished from wall paintings, being executed in it.