Rover Fish suffers from bouts of mild depression and melancholia, so Mr Mustard often tries to 'get him out of himself and takes him on walks. Does it help? Who can tell?

• Image size: 30 x 40cm
• Paper size : 38 x 48cm approx
• Edition size: 47
• Individually numbered, signed by Sam and supplied with a hand-signed and embossed Authenticity Certificate