Hi Carol, Really good to hear from you. Most of the records that would help track Richard Cain are in the Christchurch Library but I'm based in Wellington. Did Richard come to NZ before John, as I found no record of them traveling together. None of my family emigrated here (other than mine) so the NZ websites / information sources are new to me. It may take a while but I'll make further inquiries. I looked up other Cain's who emigrated from the IOM and died in WW1, there are three listed. This may assist others researching their family, the information can be found at www.aucklandmuseum.com/130/cenotaph-database.

Regards
Frank

John Joseph Cain (not your J Cain)
World War 1
Serial No 15501
Private
Occupation before Enlistment - Farm hand
Next of Kin - Robert Joseph Cain (father), Strang Bradden, Isle of Man

Robert Horace Cain
World War 1
Serial No29146
Private
Occupation before Enlistment Teamster
Next of Kin - Robert Joseph Cain (father), Post-office, Sulby, Isle of Man, England

William Henry Cain
World War 1
Serial No 11244
Private
Occupation before Enlistment - Gumdigger
Next of Kin - Mrs Francis Cain (mother), Saint Paul's Vicarage, Foxdale, Isle of Man