This exhibition focused on sculpture, prints and painting. As a painter, O'Casey drews on nature's simple, rhythmic forms to produce beautiful, spare works bathed in colour. His palette was rich yet subtle, based on a lifetime's observation of 'the harsh burnt sienna red of the glimpsed fox against the umber ploughed field' or 'the violets and purples of the bare trees against the grey Cornish skies'.
O'Casey's prints are largely abstract, with the exception of a recurring bird motif which has a timeless resonance. They show a directness of line and sureness of touch suited to this bold, graphic medium.
An understanding of the expressive power of simplified shape can be perceived within O'Casey's sculpture. Again the bird features strongly, stripped down to a still, essential form which recalls ancient sculpture. The work is condensed, quiet, but with a great, almost mystical presence.