Ironically, Mr Nation was a very prominent spiritualist who earned himself the sobriquet of "father of New Zealand spiritualism".
Wairarapa archivist Gareth Winter said this week being able to extend the online library back to 1867 was a huge plus for researchers.
He said Greytown had a small population in those early days - only a few years from the town's settlement - and the newspaper reported virtually everything that happened.
"It covered everything and not just in Greytown either, as it extended its reach into other parts of Wairarapa," Mr Winter said.
By going to the website, www.paperspast.natlib.govt.nz, researchers could search by entering key words, names or locations.
They should be able to quickly ascertain information, if it existed.
As far as the archive itself was concerned it would speed up finding information enormously by taking away the need to laboriously thumb through hard copies of the papers.
"So it's a win for the archive and for our customers," Mr Winter said.