I'm standing on top of the last (highest) obstacle, looking east and down on Matt H and Jeff A. There is a tunnel under these chockstones, emerging to west near some bushes. Often one will find rappel slings tied off the bushes near the upper tunnel entrance.
A view of the Tunnel from BELOW the chockstones
is here.
In "the old days" we chimneyed by the chockstones; a very exposed difficult chimney for a short person.