1: necessary protection (pencil, t.l.-t.r.); light falls through a dark landscape (l.l.-b.c.)
2: Necessary Protection (pencil, t.l.-t.c.)
3: Necessary / Protection (charcoal, t.l.-u.c.); a fall of light. (b.l.-b.r.)
A significant number of 'Necessary protection' paintings and drawings were exhibited in McCahon's 1971 exhibition, Necessary Protection, Barry Lett Galleries, Auckland, 1-12 November 1971. No catalogue accompanied the exhibition so it is impossible to determine exactly which works were shown on that occasion.