Researching: Faas & Dekker (Netherlands); Hunter & Barnsley (UK & Western Australia), Williams, Kelly, Willis, Bagshaw, Stone (UK), Kraushaar & Fesenmeyer (Germany & Australia); McMeekin (Antrim, Ireland & Western Australia); Liddell, Gutcher, Mowat & Gray (Orkney, Scotland & Australia); Wyllie & Trevena (Australia).