Dowsing help for museum board of Ohio French historical site

Once a member of the museum board, for a French historical land track, contacted me to map dowse satellite images. Any archaeological finds made during the survey, were to be placed in displays with my name as Cofounder.

Here is the letter I got later, from the archaeologist who requested the map dowsing.

Back over the summer you dowsed some photos for me of a site i am associated with.
Just an update on finds.

Numerous brass and silver buttons
Plethora of nails (rose heads and later)
The smallest, domed tack
A tiny, copper childs thimble
A copper indian bracelet
2 Mercury head dimes
2 very old iron ax heads
Half of a large copper band
Arrow heads, flint and such
All kinds of iron "what nots"
A clay marble that I know dates to between 1782 and 1801 (by the location it was found).



And, something I cannot even begin to describe. Its still in the ground but looks like a
stone slab with what can only be described as (for lack of a better way to describe it)
the points of 2 german helmets at each end that rise up about 6 inches from the slab.
thought i had the picture saved on my computer, but cannot find it now.





Anyway, thanks a million for your help. and, may I ask for your help again?

Attached is an ariel image of some land in my possession that at one time was part of the tract of land
where the above items came from. Would you please dowse it at your convenience to see what appears?

it was used as a horse farm at one point in its past and prior to that there was a mine of some sort on the lad and I have found numerous horse shoes and other iron & metal "what nots" all around. looking for any coin areas, artifacts, bottle dumps, etc... as well as any possible relics.
Image is attached in both jpg and as a bmp.

Thank you