On 1st September 1854, the Hovedbanen,
the first railway in Norway,
started service between Oslo and Eidsvoll.
It was built by Robert Stephenson
with Standard Gauge.
The engineer Carl Abraham Pihl
(16 January 1825 – 7 September 1897)
urged that other lines
should be built with a narrower gauge
to keep costs down,
and the 3′ 6″ measure he chose
was known by his initials (CAP)
until the South African Railways adopted it.
Then the name changed to “Cape Gauge”.
History of rail transport in Norway – http://en.wikipedia.org/wiki/Rail_transport_in_Norway#History
CAP or Cape gauge – http://en.wikipedia.org/wiki/Cape_gauge
Rail gauge in Norway – http://www.norsk-jernbanemuseum.no/en/about-us/norwegian-railway-history