Dr. Hodgkin stated that, besides the two letters, portions of which had been read, and the drawings and charts, M. Mouhot had likewise sent an elaborate description of the ruins which he found at Ongcor and in its vicinity. The plans on the table would give some idea of the magnitude of these ruins. A great part of the manuscript which accompanied them described their structure and workmanship. They were constructed chiefly of granite, and many of the stones were not only of very large size, but were elaborately carved. The workmanship of some of them was described as exquisite, and the designs not so deficient in artistic taste as one might suppose. Many of them represented imaginary animals, such as serpents with many heads; others, beasts of burden--horses, elephants, and bullocks. These temples were situated in a district which was now completely imbedded in a forest very difficult of access, and were so much in ruins that trees were growing on the roofs, and many of the galleries were in a state of great decay. The base and a large portion of the elevation were constructed of a ferruginous rock, but for the upper part blocks of granite were used--so exquisitely cut as to require no mortar to fill the interstices, and carved with relievos relating to mythological subjects indicative of Buddhism. M. Mouhot had copied some of the inscriptions, which from their antiquity the natives who accompanied him were unable to read. The characters so nearly resembled the Siamese that Dr. H. had no doubt that a skilful archæologist would have very little difficulty in deciphering them. He believed that the remains in question would be found equal in value to those which had recently been explored in Central America; and he felt convinced that when the descriptions were published, M. Mouhot would be thought deserving of great respect.