[3] He was elected Fellow of the Royal Society in 1912 on the proposal of Sir J. D. Hooker and was awarded the Hector Memorial Medal in that same year.Johannes Paulus Lotsy, the Dutch botanist, lectured on the place of hybrids in evolution.The Swedish couple Einar and Greta Du Rietz stayed six months in the summer of 1926–27 collecting from the Far North to the subantarctic islands, paying special attention to lichens.He was thanked by co-authors Robert Malcolm Laing and Ellen Wright Blackwell in the preface of their classic book of New Zealand biology Plants of New Zealand for "helping us over many slippery places and for much generous assistance freely given”.[5] He encouraged Charles Ethelbert Foweraker, later senior lecturer in botany, and sometime lecturer in charge of the Forestry School, at the University of Canterbury, in his career, the two men having first corresponded in 1911 when Cockayne was writing The Vegetation of New Zealand; the two went together on many expeditions in Marlborough and Canterbury.