The best you can probably do in the way of a list of inmates (wards) of Preston is to examine the U.S. Federal censuses for Ione, Amador County, California covering the years you are interested in. That's how I found my uncle as a ward incarcerated there.
the Railroad industry
It had the greatest effect on the railroad industry.
Pomfret School was created in 1894.
Cottesmore School was created in 1894.
The Armidale School was created in 1894.
Desborough School was created in 1894.
Craigholme School was created in 1894.
Shipley School was created in 1894.
Bryanston School was created in 1894.
Queenswood School was created in 1894.
Abbott Street School was created in 1894.
Grace Church School was created in 1894.