Arg. Saesneg gwreiddiol = Original English ed.: Llundain: Evans, 1994.
Yn cynnwys mynegai = Includes index.
Addasiad Cymraeg gan = Welsh adaptation by: Siân Roberts.
Dilyn afon by Paul Humphrey. ISBN 0237519151. Published by Evans in 1998. Publication and catalogue information, links to buy online and reader comments.