Onoto Watanna (pseud.), [313].
On the Death of Claude Debussy, [168].
On the Iron at Big Cloud, [303].
Openway, [310].
O Red Rose of Life, [16].
Orion and Other Poems, [26], [107], [110], [112], [114], [116]-[117].
Osborne, Marion, [295].
Our Canadian Literature, [387].
Our Lads to the Front, [342].