The Gryphon’s Skull is dedicated to Jack Horner, whose Dinosaur Lives gave me the idea for it. I owe him special thanks for the pleasure of his conversation, and for his patience with my questions about Protoceratops skulls. Any errors, of course, are purely my own.
I have, as best I could, used in this novel the weights, measures, and coinages my characters would have used and encountered in their journey. Here are some approximate equivalents (precise values would have varied from city to city, further complicating things):
1 digit = 3/4 inch
4 digits = 1 palm
6 palms = 1 cubit
1 cubit = 1 1/2 feet
1 plethron = 100 feet
1 stadion = 600 feet
12 khalkoi = 1 obolos
6 oboloi = 1 drakhma
100 drakhmai = 1 mina
(about 1 pound of silver)
60 minai = 1 talent
As noted, these are all approximate. As a measure of how widely they could vary, the talent in Athens was about 57 pounds, while that of Aigina, less than thirty miles away, was about 83 pounds.