For me, UC Berkeley's Bancroft Library has produced a gold mine of information regarding searches similar to yours. For example, here's one entry in the Bancroft stacks:
Bardwell, John Milton, d.1892. Day book of saloon in Last Chance,
Placer County, June 16 [1859]-Sept. 17, 1860, and day bookof grocery store
in Last Chance, June 2-Nov. 5 [1866] Last Chance, Calif., 1866. 1
v.(unpaged) 31x12cm
And here are two additional holdings:
MAP. Last Chance and Dago Hill. [1907?] Scale [1:2,400] 1 map ; on sheet
68 x 82 cm.
[Long Display] (UCB)
MAP. Last Chance Mine : Humbolt [sic] Nev. [191-?] Scale [1:600]; 1" =
50' 1 map : ms. ; 26 x 51 cm.
[Long Display] (UCB)
Back in the day........I would use Bancroft's "Melvyl" search system to produce such results. Perhaps that same (or better system) is available to you today.
Caution: Last Chance is also in the Yukon Territory; so make sure you are only reading about the Calif. Last Chance.
Good luck !!
Don....