I found these extraordinary negatives on ebay a couple months ago. The negatives show a celebration and parade in Los Angeles.
There were no details or dates.

ebay

ebay

ebay
below: This negative aroused my interest the most.....the building, under all that bunting, looked vaguely familiar to me.

ebay
After going through my files I finally decided the photograph was of the Elk's Building (aka B.P.O.E.) at the summit of Angels Flight.
below: Here is the same photo that I changed to black & white just for fun.

ebay
below: Here is a photograph of the Elk's Building atop Angels Flight. (compare the two photos)

usc digital archive
For once I solved a mystery on my own.
That said, I wonder what the hotel is directly south of the Elk's Building (all you can see is the sign 'hotel' in the vertical photograph).
Anyone??