Blinky got it.
a tulip poplar with hollow and European Giant Hornet colony inside.
if you saw any dark wood, that was from the staining from the decay.
that "chambered pith" was the paper hive material.
i cut out some square holes in it to take a look at the hive.
didn't know the bees where there till we were about to do the removal, or i would have killed them in the dark first.
Tied into the crane and dropped the top out and quickly repelled away.
at the cut point (maybe 12 feet above the active hive or so) the log was hollow some there too.
went back up with the crane and poor gas down inside the hollow and it ran down to the hive killing them.
then dropped the log. no one got stung.
(another picture of paper nest)