Here is a map from 1908 of L.A.'s railroads and electrified railways.
usc archive
It shows Commercial Station on Alameda but I haven't been able to find any information or photos.
usc archive
Above: The first station that caught my eye on this map was the Arcade Depot,
also on Alameda. I was able to find several photographs of this impressive structure.
Below: The Arcade Depot in 1900.
usc archive
unknown
unknown
usc archive
Below: And last but not least my favorite find.
This photo was listed under photographs showing vacant lots.
To my surprise when I enlarged it, there was the Arcade Depot in all it's glory.
usc archive
This is the Arcade Southern Pacific Depot looking east on 5th Street in 1890.
Notice the 'Narcisse House' on the right.
GaylordWilshire....could the mystery building in the old high school pic be
this one.....or is the Arcade Depot too far south?