Ping: Hen-Wen

Regarding The Chronicles of Prydain illustration, I believe I have enough to go on. I'm thinking it will be, like the current one, a pencil drawing with color highlights, in this case reds and oranges rather than blues (for Eilonwy's hair and the Horned King's eyes, specifically, and perhaps yellow-orange for the golden thingamajig.) I have one major question: All the illustrations I have found of Eilonwy depict her at different ages, anywhere from a young teen all the way up to early adulthood, so I'm having trouble pinning down her age. I assume you would like me to draw her at approximately the age she appears in The Book of Three, but I'm not quite sure what her age is. Thanks.