@Matt I have added a layer containing the NZMS13 'Survey District' maps from the 1800s. The snapshot is taken as of the end of 1899, though some maps go back as far as the 1860s. There were more maps printed than I have managed to locate and include here, so if you know of a digital source for any sheets that are missing, let me know.
(2016/06/15 05:21)