four o'clock
At midday , when we went on deck for the afternoon watch , I ran to the side ; but there was no sign of the great shadow ship . All that watch , the Second Mate kept me working at my paunch mat , and Tammy he put on to his sinnet , telling me to keep an eye on the youngster . But the boy was right enough ; as I scarcely doubted now , you know ; though -- a most unusual thing -- he hardly opened his lips the whole afternoon . Then at four o'clock , we went below for tea . At four bells , when we came on deck again , I found that the light breeze , which had kept us going during the day , had dropped , and we were only just moving . The sun was low down , and the sky clear . Once or twice , as I glanced across to the horizon , it seemed to me that I caught again that odd quiver in the air that had preceded the coming of the mist ; and , indeed on two separate occasions , I saw a thin whisp of haze drive up , apparently out of the sea .