fearn,  thanks for that link.  You are a bad influence as I have now ordered a copy.  Alone not bad but when "An Ethnology of the Admiralty Islands" is added rather naughty 

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This club is rather like a sword club.  It is light enough to be used fast with one had in much the same way as the shorter light Dha.  Close contact with a spike end. The grip has plenty of room for two hands.  I am surprised how well balanced and pleasant it is in the hand.