Art and text: Hal Foster and John Cullen Murphy (from page 1981, January 26, 1975).
Source: Prince Valiant (Vol. 20): 1975-1976 – Hal Foster and John Cullen Murphy (Fantagraphics Books, 2019).
See also the previous posts:
• The Return of Karen and Valeta
• “We Are the Daughters of the Prince of Thule and the Queen of the Misty Isles”