|Legend Arthurian, 1995|
Anna-Marie Ferguson clears up the confusion (sort of) in her companion book to the deck called A Keeper of Words: 'In the stories Peredur (approx 13th centuryWelsh) and Perlesvaus (13th century French,, the Grail bearer appears as both the beautiful maid and the repulsive crone. In light of this, it seems logical to assume that the figure who bears the Grail in the home of the Fisher King is the Sovereignty of Britain, sometimes called Brigid, Brigantia or Brittania.'
Oh. Is it logical? I guess it is to Anna-Marie Ferguson. So as near as I can figure, she's saying the Queen of Cups is the Grail Bearer from the Fisher King's palace, who is also Britannia, and might also be Elaine (the chick from 9 of Swords who starves herself and floats down the river to be buried at Camelot, for love of Lancelot). I can see how Elaine might be Queen of Cups (or at least her shadow aspect), and I can see how the Grail Bearer might be seen as Britannia, but I can't see how Britannia is Queen of Cups.
But no matter! It's still a female figure and a cup's on the card, so we can read it like any Queen of Cups in any deck. She's an emotional woman, quite empathetic to others, but she has a tendency to go a bit codependent if she's not careful.