"Have the goodness to take a northerly direction towards Melville Bay, and from thence try and penetrate into Smith's Straits. "THE CAPTAIN OF THE _Forward_, "K. Z. "Monday, April 30th, "Abreast of Cape Walsingham." "Is that all?" cried the doctor. "That's all," replied Shandon, and the letter fell from his hands. "Well," said Wall, "this chimerical captain doesn't even mention coming on board, so I conclude that he never will come." "But how did this letter get here?" said Johnson. Shandon was silent. "Mr. Wall is right," replied the doctor, after picking up the letter and turning it over in every direction; "the captain won't come on board for an excellent reason----" "And what's that?" asked Shandon quickly. "Because he is here already," replied the doctor simply. "Already!" said Shandon. "What do you mean?" "How do you explain the arrival of this letter if such is not the case?" Johnson nodded his head in sign of approbation. "It is not possible!" said Shandon energetically. "I know every man of the crew. We should have to believe, in that case, that the captain has been with us ever since we set sail. It is not possible, I tell you. There isn't one of them that I haven't seen for more than two years in Liverpool; doctor, your supposition is inadmissible." "Then what do you admit, Shandon?" "Everything but that! I admit that the captain, or one of his men, has profited by the darkness, the fog, or anything you like, in order to slip on board; we are not very far from land; there are Esquimaux kayaks that pass unperceived between the icebergs; someone may have come on board and left the letter; the fog was intense enough to favour their design." "And to hinder them from seeing the brig," replied the doctor; "if we were not able to perceive an intruder slip on board, how could _he_ have discovered the _Forward_ in the midst of a fog?" "That is evident," exclaimed Johnson. "I come back, then," said the doctor, "to my first hypothesis. What do you think about it, Shandon?" "I think what you please," replied Shandon fiercely, "with the exception of supposing that this man is on board my vessel." "Perhaps," added Wall, "there may be amongst the crew a man of his who has received instructions from him." "That's very likely," added the doctor. "But which man?" asked Shandon. "I tell you I have known all my men a long time." "Anyhow," replied Johnson, "if this captain shows himself, let him be man or devil, we'll receive him; but we have another piece of information to draw from this letter." "What's that?" asked Shandon. "Why, that we are to direct our path not only towards Melville Bay, but again into Smith's Straits." "You are right," answered the doctor. "Smith's Straits?" echoed Shandon mechanically.