Apparently the earliest surviving account of his sarcophagus having been available follows the last surviving account of the A the G sarco having been seen, by just a few years.
BTW, there’s a clickbait POS YouTube channel called Future Unity, all their stuff is utter garbage, they’ve got a vid about how Alexander the Great’s been found. Also Genghis Khan. And Cleopatra. And King Arthur. Yeah, I’m buyin’ this. [barf]
Their vid is a bunch of froth, and plastered-together montages, but discusses St Mark’s.
https://www.youtube.com/watch?v=BXCjw7TDRi4
http://www.alexanderstomb.com/main/index.html
this is apparently chugg’s own site. some interesting citations/details including the documented movement of alexander’s corpse from memphis to alexandria, etc.
there are interviews with chugg also, if one digs. i did years ago, I think that is where I found his 25% chance is original corpse even if his theory is correct comment.
it is pointed out that alexander had a couple of well-documented wounds which might be visible on extant remains (or missing), which would be a non-invasive method of examination. a pipe-dream of course, church will never allow anyone to examine them with this theory out there.