A & C Black 3a, 3b and 3c - River Tamar and Dartmoor Each issue of Black's Guides (listed under Torquay, c.f .) contained three single page maps: of Dartmoor Forest, and the River Tamar (two strip maps). These very basic maps were updated first with the deletion of Macfarlane´s signature and subseqently only to show new railways and Bartholomew´s various signatures after 1889. The small changes made are listed below. (3a) DARTMOOR FOREST. Plymouth to Oakhampton. English Miles 5 = 25 mm. (3b) RIVER TAMAR. UPPER PORTION . Launceston to Wooley Barrows. English Miles 5 = 32 mm. (3c) RIVER TAMAR. LOWER PORTION. Plymouth Sound to Lawhitton. English Miles 5 = 32 mm. All have i mprint: Published by A & C Black, Edinburgh . Signatures : J. Bartholomew Edin r ; and Printed by W H Macfarlane, Edin r . Size: 140 x 85 mm (each). 1. 1862 As described above. ...