Unreleased Rogue Trader adventurer (Bryan Ansell's collection)

Today's offering from the Ansell horde is yet another unreleased Rogue Trader Adventurer:

This figure is labelled "Feral Shaman" on the tab and was produced in 1987. I don't know who sculpted it but at a guess I would say Trish Carden or Aly Morrison. Could be wrong though. No idea who painted it but it was part of the collection of Bryan's painted Rogue Trader Adventurers that can be found in this advert from White Dwarf 99:

I have no idea what he's carrying under his arm - any suggestions? Also, does anyone recall reading about feral shamans in the old Rogue Trader rulebooks or White Dwarfs, or do you think he's just a "generic character"?

The Bryan Ansell collection: Warhammer 40k Rogue Trader Adventurers and Forces of the Imperium

These guys were produced in 1988 and made their appearance in painted form in White Dwarf 99. Sadly Bryan's collection does not appear to be complete; the remainder may yet to be found in his collection, or may have been scattered to the four corners of the galaxy.