Prompted by
Mackerm's recent post, I was looking through various materials which turn out to be not much to the point; but perhaps some effluvia from my search will be of some stray interest:
Here's a detail from an 1852 sketch by William Rich Hutton (now in the Huntington Library) showing the area (but from a different direction) of the early photograph mentioned in the earlier post.
from Huntington Library item number HM-43214-32, sharpened and with enhanced contrast
For those who might want to locate
very precisely the location of the Bath Street School (not that it was in question), here's notice (as "2nd") of its availability for purchase:
LA Times, 4/8/1883
I don't have a precise date on which it was originally built--I've run across a "ca. 1854" somewhere, say my hasty notes--but after its service as a school, it was bought by the interesting Andre Briswalter in 1883, only to be demolished with the widening of Bath St. in 1884.