The Derk Isle. Scots version of Yr Ynys Ddu. As the bumbling detectives Parry-Williams and Williams-Parry follow their own noses, Tintin decides to follow Milik’s more dependable nose and heads. As the bumbling detectives Parry-Williams and Williams-Parry follow their own noses, Tintin decides to follow Milik’s more dependable nose and heads off after international money forgers.