....Blood Hill

Continuing from here. This central valley at Blood Hill has several other structures besides the massive "J" at the top of the ravine. I stumbled on a new pocket of double-chambered mounds about 50 yards downhill from the road the climbs the hill and, at that point, passes a number of "foundations".
These double chambered mounds were in the bushes and hard to photo. This was below near the ravine bottom.

You can barely make out the double chambering:

Or something like this:

These used bits of quartz, as in the piles seen on the way up to here.