Thanks for all the suggestions about finding Kerlin's Well. Before I set out for northern Arizona, I spent some time at the Mesa Public Library looking at every one of the topographical maps of the area. There was precious little information about the Beale Wagon Road on the USGS maps. I also checked Barnes, Will C., and Byrd H. Granger. Will C. Barnes' Arizona Place Names. Tucson: University of Arizona Press, 1960. There was an entry for Kerlin's Well but the location, cited as near Floyd's Peak, was even more vague than what I already had. I did go back and check out all of the topo maps around Floyd's Peak however.