My pleasure. The obsidian trade, which is at least twice as old as recognized literacy, goes back well before the supposedly controversial beginning of trade in this paper, so I got in a touché as well. :^)
13 posted on 02/13/2018 7:04:35 AM PST by SunkenCiv
(www.tapatalk.com/groups/godsgravesglyphs/, forum.darwincentral.org, www.gopbriefingroom.com)