Great find Jim,
yes Beaver Brook but that Flag.
Looks like it is darkroom manipulation and I notice it's a 36 star, obsolete by two for 1877.
I had to go look that up(not being from around these parts) and the 6x6 pattern wasn't "official", it seems.
That platform in that configuration(from memory) didn't last too long.
UpSideDownC
in New Zealand