That was probably it. The only time I read Lake's book was when I checked it out of the library those many years ago. I think I saw another book there on old west or Arizona history with one of those photos taken from inside the corral that made the same claim. That was probably taken from Lake too.
All this reminded be of the painting of the gunfight by Victor Clyde Forsythe on page 37 of the October 2006 issue of Wild West magazine. The shootout is shown taking place between those two buildings. The caption under the illustration says that Forsythe's father owned a store in Tombstone and may have seen the gunfight. In the painting, the store next to the Papago Cash Store has a sign "Chandler & Forsythe's C.O.D. Store". This got me looking through some old newspaper advertisements. There were a couple for the Papago Cash Store at 324 Fremont St. and one for Chandler & Forsyth's Cash Store at 328 Fremont St. Even so, it appears that the painter relied more on Lake than anything his father might have said while making the painting.
Btw, I rather like the painting(made in 1952). I googled Forsythe and found some info on him, but couldn't find an image of the painting or where a print of it might be for sale.
I know this isn't really relevant to anything, but found it interesting anyway.
Bruce, Thanks for the link to the painting. Although it was done by Forsythe, it's not the same one that was in the issue of Wild West magazine. There are similarities, but that one was more detailed ... more