I started off with trimming the scraps off.
Then I sawed the end off and mounted it in the lathe, using a two prong drive spur.
A Shape already suggested itself that would maximise the wild nature of the grain around the roots and I started to rough this out, the spur drive jumped out a couple of times as the torque was pretty heavy and the speed was quite low (about 400 rpm) but it just went off centre rather than flying around the workshop at that speed, I was happy enough with that.
I resized the piece to a more pleasing dimension and drilled out a core with a forstner type bit to a depth of about 4", then drilled the rest of the way down with a 12mm long shank woodspur bit.
I then commenced hollowing out to a thickness of about 18mm except for the base which I left heavy in case I needed to revise the shape some or cut a new tenon.
Hollowing was done with a home made tool using a 5/8" shaft, a small mild steel cutter holder (home made) and a Carbide cutting disk from AZ Carbide.
The piece is now drying and already showing a lot of splitting, so I am intending to use coloured fills and other effects on this once it has dried, be a few months yet.