Sullivan"s from Bantry Bay Ireland

Hi, I am looking for information on my great great grandparents Mortimer Sullivan and Ellen Sullivan(nee Daly) from Bantry Bay Ireland who arrived in Wellington New Zealand about 1881. Mortimer Sullivan we believed died not long after he arrived we cannot find a death date for him or his wife Ellen. Their children"s name are Francis Joseph, Mortimer, James, Bridget Frances married Robert Adair and lived in Waitotara Valley.

Any help would be great. Thanks

Phillippa