Paul,
One possible source of Tom’s reference may come from H.E.A.T.’s Archaeological Report. I have not seen that report, except for the excerpt in Jesse’s new book. I really need to read the complete 32 page document before offering anything but…….
From
Jacob's Trail
"The report was submitted by Erik Steinbach and Dr. Glen E. Rice, under Rio Salado Archeaology."
“The mine very likely pre-dates the Gadsden Purchase …… The exclusive use of hand hewn rather than milled timbers for shoring the mine, and the absence of a mining claim in Government documents suggest the mine does not date to the period between A. D. 1860 and 1900 of active Anglo American mining in the Superstition Wilderness.”
I had just become involved with the LDM when the H.E.A.T. project was getting underway. I was very excited at the prospect of their being able to date the dig artifacts by the use of dendrochronology (Tree Ring Dating). The apparent inability of using the old timbers discovered to definitively date the dig was by far the most disappointing aspect of the project. For me, that would have settled the question of the date of Spanish mining in the Superstition Wilderness once and for all.
As it stands, I’m still on the fence.
Garry