There are a number of A. Dobson's who immigrated to New Zealand, one to Aukland in 1889, and others to Wellington 16 Oct 1912, 2 Dec 1889, 14Aug, 1921, 1921, 24 Nov 1909, and so on.
A Margaret Graham was born in New Zealand in est. birth year of 1871, she immigrated to Seattle, King, Washington in 1925 at the age of 54.
A Catherine Graham immigrated to New Zealand. She departed Monaghan (Ireland?) 14 Jan 1873 and arrived in New Zealand 7 May 1873 at Auckland, NZ.
A Margaret Graham left Antriim, (Ireland, I assume) 29 Aug 1874 on the Pleides and arrived New Zealand 16 Dec 1874 at Canterbury.
The list continues at familysearch.org .