According to The Fairlie Locomotive, this engine was originally built as
Stockton & Ione #2, named the Amador and was built in 1875. It was
sold used to the Columbia & Puget Sound who renamed it the A.A. Denny.
From Chris
Just read a contemporary
report of the A.A.Denny arriving on the C&PS as a "brand new
engine" and if Crisolite is correct about the S&WW being formed in the
LATE 1870s (and I have no reason to doubt him!), then the Columbia and Puget
Sound RR would have taken over around the right time for the A.A.Denny to have
come into being in the year 1880. Her vlve gear seems to suggest an 1880
construction date.
The A.A.Denny was in fact, engine No.1 of the Columbia and Puget Sound RR,
serving the coal mines of King County. She also carried a good amount of
passenger traffic. She was built by Mason and weighed 75,000 pds. with
14x16" cylinders. Apparently, the C&PS RR was originally the Seattle
and Walla Walla RR.
Michael Anderson - from the University of Washington Archives