4 patterns for the Calder Hall Kneeler, all on card back to back. a) and c) are biro pen outline designs on squared paper and c) has pencil annotations on colour added. b) and d) are black and white copies of paint outline designs on plain paper. The design shows power station chimneys on the left, a building in the middle and an electricity pylon at the right, with flame motifs around. The words “Calder Hall” appear at the bottom (part of the Sellafield nuclear plant).