Brooks: Diplomacy and the Borderkmds State, contain a mass of information on the subject which could have been obtained only in the perusal of countless pages of earlier correspondence and reports. And their very number is impressive, particularly the high-water mark of fifty-five letters of instruc- tion sent to Onis in the month of July,.1817, all concerning details aside from the lengthy statements of general policy governing the negotiation.' Special reports, and innumerable accounts from colonial officials of frontier claims and disputes, were sent in to the foreign office. One of especial interest, which it is reasonably certain was used by Heredia, is the famous report on the limits of Louisiana and Texas prepared by Father Jos6 Antonio Pichardo. In the archives at Sevilla is a letter from the viceroy of Mexico, dated March 15, 1813, in which he said that the copy of Pichardo's historical memoir could not yet be sent to Spain, as only 1,969 of its 5,127 pages had been copied.' Another, dated September 30, 1816, announced that the copy of the report, which had just been completed, was being sent in two boxes containing thirty-one volumes. But it was ex- plained that the plans which were to accompany it had not been completed, because of the illness of the man who was preparing them, the same Gonzalo L6pez de Haro who in 1789 had piloted a vessel to Nootka Sound. On the margin of this letter is a notation made by the secretario do estado, requesting that the report be placed at the disposition of three department officials, among them Heredia. Little was done to further the negotiation for some time after Pizarro's appointment. It will be remembered that Erving, in his despatch quoted above, complained that Pizarro had not men- tioned the affair at any time between September 30 and Decem- ber 15. Meanwhile, the policy to be followed was outlined in a Bosquejo (sketch) of relations with the United States, submitted to the King on November 6, 1816." This paper, unsigned but clearly originat- ing in the foreign office, was prefaced by a castigation of the United States as being ungrateful in view of Spain's aid in her revolution against England, and as being "always anxious to promote rebel- lion and perfidy." There followed a lament'over the sale of Louisi- ana, allowed by the "perfidy" of France, and the "weakness and stupidity" of Spain. The North American republic was accused of