6 o'clock in the evening
`` Well , '' said Captain Griswold , `` you 're a British naval officer and should know something , whether you do or not . But I 'll tell you right now I hope the submarine does n't show up again . '' Nevertheless , Captain Griswold was doomed to disappointment , for the U-87 did reappear . It was almost 6 o'clock in the evening when all on board were startled by a cry from the lookout . `` Submarine on the port bow , sir . '' Instantly all became confusion on the big merchant ship . Passengers , of whom there were perhaps fifty , became greatly excited .