always be certain, and it would be a great pity to lose what might aid in so urgent a need.  For this purpose you will make an examination of all the mines that are or may be known, offering rewards and other advantages, honors, and gratuities as may appear expedient to you, in order that the mines may be discovered and worked, as they should be, making the diligent endeavors that are necessary in such an affair.  In order that you may better manage it, it has seemed well to me to send you the two papers inclosed, signed by Juan Ruiz de Contreras, so that you can examine and consider them with attention and careful consideration, in order that your mode of procedure may be assured, since the facts in the case are already so.  As the most important point that you will have to guard is that the Indians be not troubled or annoyed, and that no sort of injury, or service, or annoyance be inflicted upon them, you will avoid so far as possible these difficulties; and by prudent and cautious measures will try to gain their good-will, until you have acquired suitable knowledge of the situation and richness of the mines.  It is also a matter of great importance that the religious who give instruction shall aid, as is explained in these papers—­to which effect letters are being written to the provincials of the orders of St. Dominic and St. Augustine, which were sent to you with a copy of each, which they are to receive from your hand.  You will talk with them at the same time, availing yourself of all means which may appear to you of use to persuade them that they will thus do a great service to our Lord; and that by so pious a work they will better the present condition of affairs, and aid the public cause.  You must see that this is the most important part of your government, as if you were sent there for this and for nothing else.  For greater satisfaction and surer success, I command you that as soon as you have received these letters you shall—­with the aid of the notary-public of the royal officials, or of your secretary, as may appear best to you—­compile a book, in which, after you have inserted these letters and other documents, you will enter the orders that you may give, and the decisions that you may make.  Accordingly, there will be evident from them both the time that is gained or lost in the execution of your orders, so that with this guide you may govern to better advantage; likewise, exactly what has occurred in every matter will be clear to me.  It would also be well if all the documents, letters, and other papers that you may have in relation to this subject were placed in separate files.  In this book recapitulate the papers briefly, referring to the originals; and as you are aware of the importance of good counsel, you will try to avail yourself of the persons whom you may think most capable of giving it to you.  If you think it well to convene any assembly, you will do so whenever expedient.  In this way you may be advised not only of the importance of this matter, but likewise of the best means available for this country, so that, with your prudence, you may choose the most useful, and avail yourself of whatever benefits or funds may be secured from them.  Madrid, December 19, 1618.