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Troubador Publishing website, viewed 25 May 2021:
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author details (Peter J. Robinson; born in London; from an early age, developed a passionate interest in birds; has travelled widely in his search for exciting new species to add to his 'life-list'; following twelve years with the London Fire Brigade, switched to the Royal Society for the Protection of Birds (RSPB), where for sixteen years he headed up the Investigations Section, dealing with criminal activities)