Law’s Spring, AZ, was observed on July 15, 1859, and described in great detail on p. 67 of Hathi.
Kerlin’s Well, AZ, July 13, 1859, noted twice on p. 52 of Hathi. Beale regards Kerlin’s Well as a “permanent”water supply; it is described again in detail on p. 64.
Union Pass, AZ, Beale is noted in video to have passed thru Union Pass in 1857 @ 0.42, & old road shown @ 3:45 of /4.40 min. AZ Highway 68 now uses Union Pass.