The object of the following collection of documents is not to give the whole history of any episode of piracy or of the career of any privateer, but rather, by appropriate selection, to illustrate, as well as is possible in one volume, all the different aspects of both employments, and to present specimens of all the different sorts of papers to which they gave rise. Nearly all the pieces are documents hitherto unprinted, but a few that have already been printed, mostly in books not easy of access, have been included in order to round out a story or a series. The collection ends with the termination of the last colonial war in 1763. Presented in chronological order, it may have a casual, as it certainly has a miscellaneous, appearance. But variety was intended, and on closer inspection and comparison the selection will be seen to have a more methodical character than at first appears, corresponding to the systematic procedure followed in privateering, in prize cases, and in trials for piracy. On the outbreak of war in which Great Britain was involved, it was customary for the King to issue a commission to the Lord High Admiral (or to the Lords of the Admiralty appointed to execute that office) authorizing him (or them) to empower proper officials, such as colonial governors, to grant letters of marque, or privateering commissions, to suitable persons under adequate safeguards.[1] The Lords of the Admiralty then issued warrants to the colonial governors (see doc. no. 127), authorizing them to issue such commissions or letters of marque. A specimen American privateering commission may be seen in doc. no. 144; a Portuguese letter of marque, and a paper by which its recipient purported to assign it to another, in docs. no. 14 and no. 15. Royal instructions were issued to all commanders of privateers (doc. no. 126), and each was required to furnish, or bondsmen were required to furnish on his behalf, caution or security[2] for the proper observance of these instructions and the payment of all dues to the crown or Admiralty. Relations between the commander and the crew, except as regulated by the superior authority of these instructions and of the prize acts or other statutes, were governed by the articles of agreement (doc. no. 202) signed when enlisting. [Footnote 1: See R.G. Marsden in _English Historical Review_, XXI. 251-257, and a commission in Rymer's _Foedera_, XVIII. 12.] [Footnote 2: Specimen (1762) in Anthony Stokes, _A View of the Constitution of the British Colonies_ (London, 1783), pp. 315-317.]