No catalogue or exhibition list traced. The invitation gives some indication as to the exhibited works: 'This is largely an exhibition of drawings. They all belong to a series made earlier this year under the title "Necessary Protection"....The two large acrylics are about the same subject. All these works are close relations to the waterfalls of some years back'
Text extracted from: Marja Bloem and Martin Browne, Colin McCahon: A Question of Faith. Craig Potton Publishing, New Zealand, 2002, p. 256.