Now, what I'm really looking for is *high-resolution* scans of the old Colossal Cave maps described in this paper:
https://digitalcommons.wku.edu/cgi/viewcontent.cgi?article=1024&context=mc_reserch_symp
The 1845 Stephen Bishop map is here: https://commons.wikimedia.org/wiki/File:Stephen_Bishop_1842_Map_of_Mammoth_Cave,_Kentucky_-_Hi-Res.jpg
(I realize that modern maps are super-high-density and may not be available for download! But the historic ones must be somewhere.)
Aw, yeah, thank you Library of Congress