This
is a look at the Northern Pacific Class A 4-8-4s. Includes a look at
the development of the engines, their design, and use, the A-2 Class,
A-3 Class,A-4 Class, A-5 class, the Spokane Portland & Seattle
E-1 4-8-4s, and NP 4-8-4 models. Many photos, a few in color.
