Skinnarland's boss in London was Leif Tronstad, chief of intelligence,
espionage, and sabotage for the Norwegian Resistance effort and, as it happens,
codesigner of the original high-concentration plant at Vemork. All messages
between the two were in Norwegian and had to be translated for their British
counterparts. "Limpet" here refers to plastic explosive. To keep retaliations
against locals to a minimum, Tronstad suggests the saboteurs leave behind
British effects so the Germans will think the attack was conducted by British
commandos.