James Maitland Balfour

Increased coastal shipping during the mid 1800's highlighted the hazards of navigating Foveaux strait.
Low-lying Dog Island in the narrowest part of the strait was chosen as the site for Southlands first lighthouse.
It is also New Zealands tallest lighthouse (35 metres), built from stone quarried on the Island.
Designed by James Maitland Balfour, uncle of Robert Louis Stevenson.
The beacon was first lit in 1865.
The lighthouse has operated automatically since 1989

https://en.wikipedia.org/wiki/James_Maitland_Balfour

James Maitland Balfour (5 January 1820 – 23 February 1856) was a Scottish land-owner and businessman. He made a fortune in the 19th-century railway boom, and inherited a significant portion of his father's great wealth.

He was a Conservative Member of Parliament in the 1840s, and was the father of Prime Minister Arthur Balfour, 1st Earl of Balfour.

https://www.wikitree.com/wiki/Balfour-6

http://www.thepeerage.com/p6664.htm#i66637

• Burke, Bernard, Sir. A genealogical and heraldic history of the landed gentry of Great Britain & Ireland 6th ed. London : Harrison 1879. Vol I. page 71