Hi, Spades!
That would be wonderful. I think but am not sure that the file is held in Wellington:
The Register of Persons Naturalised before 1948 [Archives Reference: IA 52/26, REPRO 1646 & 1647] holds the following entry:
Breck, Thor Matison [Age] 41 [Born] Skesoken [Nationality] Swedish
Miner, Brighton, Westport. [Date of naturalisation] 30 September 1893 [File number] 1893/2212 - [Archives Reference: IA 1 18933/2212].
Magne