Jack turned around to face the pier-side, which had fallen into deep shade as the sun had swung around over the high crags and castles of Malta. By blocking the sun’s glare with his hand he was able to see a vague spot of bluish light prowling around the pier’s shadows. The mirror was held in an unsteady hand on a rocking boat far away, and so the spot of light frequently careered off into the sky or plunged into the waves. But it would always come back, and work its way carefully down the pier, and then dart upwards at the same place. After this had occurred several times, Jack raised his sights to the top of the pier and saw Pierre de Jonzac sitting there at a folding table with a quill in one hand, staring out to sea. Each mirror-flash lit him up with a ghastly light, and after each one he glanced down (his wig moved) and made a mark (his quill wiggled).