"Hearken, my men," quoth he.  "It has come to our knowledge that a vast amount of treasure lieth hidden on a cay the bearing whereof is known only to this Portuguese.  He is willing to guide us to the spot in consideration of a safe conduct to Europe and one-seventh of the spoil. By my commission His Majesty gives me power to engage in such enterprise, whereof one-tenth reverteth to our sovereign lord, the king. Be it understood that I will deal fairly with all men, dividing the residue into shares according to the regulations pertaining to treasure trove.  For your part do your work with a will.  Let no stranger learn and forestall our mission, and I warrant ye the purser shall pay in gold where heretofore ye had but silver."