"In regard to the payment of the salaries of yourself and the other gentlemen who form part of the Commission, I have ordered the Minister of the Treasury to take measures for the prompt disbursement of what may be due, and I judge that in a short times these claims will be completely satisfied. "With my best wishes, it gives me pleasure to repeat the expression of my friendship and particular esteem. "Truly your faithful Servt., "PARDO." In compliance with the directions of President Pardo, the charts made by the Commission were delivered to the Peruvian Legation at Washington. These charts were all ready for publication, and had they been published would have afforded much valuable information in regard to the Upper Amazon and its tributaries, water courses which are daily becoming more and more important to commerce, and which are destined in the not distant future to be navigated by lines of ocean as well as by lines of river steamers. The following letter from Colonel Manuel Freyre, Peruvian Minister at Washington, describes the charts and plans which Tucker delivered to the Legation, and which it is to be hoped are still preserved: "_Legacion del Peru._ "WASHINGTON, Marzo 22 de 1877. "_Senor Don Juan R. Tucker, Ex-Presidente de la Comision Hidrografica del Amazonas._ "La caja que dijo le. depositada en poder del Consul Tracy, ha sido recibida en esta Legacion, y contiene los siguientes planos; a saber: "1st. Un plano del Rio Amazonas Peruano, desde lo boca del rio Yavari hasta Borja, termino de la navegacion a vapor, dibujado sobre diez pliegos y en una escala de una pulgada por cada das millas. Los rios Ytaya y Pastaza estan incluidos en esta Plano, que cuenta 848 millas del rio Peruano Amazonas, 45 millas del rio Ytaya, y 7 millas del rio Pastaza." "2d. Un plano del rio Yavari desde su boca hasta la confluencia de los rios Yacarana y Yavarasina, dibujado, sobre das pliegos y en una escala de una pulgada por cada dos millas. Este plano cuenta 220 millas del rio Yavari. "3d. Un plano del rio Nanay desde su boca hasta el termino de la navegacion para vapores de poco calado debujado sobre dos pliegos. Este plano contiene 160 millas del rio Nanay. "4th. Un plano del rio Tigre-Yacu desde su boca hasta un punto 111 millas aniba de la boca, dibujado sobre dos pliegos y en una escala de una pulgada por cada dos millas." "5th. Un plano del rio Huallaga desde la boca hasta Rumi-Callirina, el termino de la navegacion para vapores, dibujado sobre dos pliegos y en una escala de una pulgada por cada dos millas. Este plano cuenta 169 millas del rio Huallaga.