Last Tuesday, BBC Radio 4's Making History series broadcast Sable Island – A Dune Adrift, reporter Sean Street's documentary about "Nova Scotia's Galapagos." At the Natural History Museum, in Halifax, [Sean] witnesses the unpacking of the latest consignment of bones and specimens – extraordinary ancient walrus skulls – collected by Zoe Lucas, who has been on the island for decades. He meets artist Roger Savage who had to tie his easel down, clamp his paper and battle with the scouring sand as he captured the landscape of the place in his paintings. And he meets a man who dedicated years to...