e_r:
1906 Los Angeles Street and Avenue Guide
Google Maps
But the addresses on
this Clifton are only 400s and 500s, not the 2860 we're seeking. I've run across some hints of a Clifton somewhere west of Westlake Park, which works for 2860; but I haven't actually found the street itself yet.
UPDATE
It appears that the vendor is thinking of tiny Cliff St., not Clifton:
odinthor collection, detail, Bekins map of 1904
Just for your curiosity, the illegible nearby street beginning with
Ko is, according to the map's index,
Kofoed St.. All of these little streets in this area seem to have disappeared.
And we might as well have a look at the area courtesy of the 1909 bird's eye map:
detail, 1909 bird's eye map, Library of Congress