Addasiad Cymraeg gan = Welsh adaptation by: Juli Paschalis.
Argraffiad Saesneg gwreiddiol = Original English edition: Oxford : Oxford University Press, 1991.
Teitl o'r clawr = Title from cover.
Y draenog by Roderick Hunt. ISBN 0861742060. Published by Drake in 1998. Publication and catalogue information, links to buy online and reader comments.