Not sure if he was from Cornwall, but as HOCKING appears to be a predominantly Cornish name, am putting him here to start with.
John Dillon HOCKING, according to his gravestone, was born 10 Sep 1869, and he died at Kiwitea in New Zealand on 30 Jun 1938. No birth of any HOCKINGs in New Zealand about this time so am turning to England.
Found a Mr J D HOCKING, Gentleman, aged 25, leaving London on 4 Apr 1894 on the Rimutaka bound for New Zealand, which could be him.
Ian C