The Pimeria Alta census that I have is for 1852 and does include Atil. It can be purchased from the Arizona State Genealogical Society (see their website), and it is on the shelf in the Family History Center at Tucson. Probably in other Arizona towns as well. The Atil section is only 4 1/2 pages. If you would like, I can check my copy to see if particular names are there. I tried to reply to the message you sent me, but the reply came back as an invalid address.