This topographic street plan of Apia, in what is now simply called Samoa, was published by the Department of Lands and Survey (Western Samoa) with the assistance of the Department of Lands and Survey (New Zealand).
It shows contours at 50 metre intervals, and labels all places of notability, including the final resting place of Robert Louis Stevenson on Mount Vaea.
Just over one hundred maps and charts of Samoa can be downloaded from TROPICARTA (requires Chomikuj account).