Thank you so much!
And here it is:
http://web.csulb.edu/~odinthor/socal2a.html
Or rather there it was. Parkinston and Bergstrom's 1909 Canadian Building is holding down that corner at present.
As to the
1940 Federal Courthouse, I think the decision to raze it must have been taken at the federal level. I recall it being declared "unsafe" and also too small. The Roybal Building is used as an annex.
There was talk, if I remember correctly, of moving the Superior (county) Court to the vacated Federal Courthouse and then demolishing Paul R Williams' Stanley Moske Courthouse (1960), the site of which would then be used to expand Grand Park, but that's apparently not happening.
The Federal Courthouse, on the National Register, is an icon of Modernism, the destruction of which will be on a par with that of the
State of California Building, whose site remains an empty lot. I really enjoyed the one-time grouping of the federal, state, county and city buildings. Now, of the old buildings, only City Hall and the
Hall of Justice will be left.