I attended a bankruptcy auction of the management company 30 years ago in SF.
My only purchase was a framed photo of the hospital (250 beds).
This was a BIG hospital.
Photo:
[www.carringtonfoundation.net]

From the SF Medical society website:
"Southern Pacific Hospital, at Fell and Baker Streets, was built by the Southern Pacific Railroad and used as the major medical center for its seriously ill or injured employees
from all over the West. With the rise in health plans, health insurance and better
hospitals in smaller cities, it proved uneconomical and was sold to a Dr. Upjohn of the pharmaceutical family in 1968. He renamed it Harkness Hospital but had to close it after several years of very large losses and it is now senior housing."

With freight & passenger trains, ferries and interurbans they must have
been a huge employer.
That's my .02 cents,, Paul on the Cal-P