Elias, an apprentice in a nineteenth-century print shop, had left his woodcut on the master's desk. The master was speaking to a customer in the next room. Elias stood by the press, rubbing the edge of his thumb until it reddened. Each time a footstep crossed the passage, he looked towards the door. The press stood silent beside him.
From the third sentence of the passage, identify the words which show that Elias is anxious.