the Ruins of an Ancient City, discovered near Palenque, was published in London in 1822 based on the reports of those last two expeditions together with engravings based on Bernasconi and Castañedas drawings; two more publications in 1834 contained descriptions and drawings based on the same sources. Juan Galindo visited Palenque in 1831, and filed a report with the Central American government. He was the first to note that the figures depicted in Palenque's ancient art looked like the local Native Americans; some other early explorers, even years later, attributed the site to such distant peoples as Egyptians, Polynesians, or the Lost Tribes of Israel. Starting in 1832 Jean Frederic Waldeck spent two years at Palenque making numerous drawings, but most of his work was not published until 1866. Meanwhile, the site was visited in 1840 first by Patrick Walker and Herbert Caddy on a mission from the governor of British Honduras, and then by John Lloyd Stephens and Frederick Catherwood who published an illustrated account the following year which was greatly superior to the previous accounts of the ruins. Désiré Charnay took the first photographs of Palenque in 1858, and returned in 1881–1882. Alfred Maudslay encamped at the ruins in 1890–1891 and took extensive photographs of all the art and inscriptions he could find, and made paper and plaster molds of many of the inscriptions, and detailed maps and drawings, setting a high standard for all future investigators to follow. Maudslay learned the technique of making the papier mache molds of the sculptures from Frenchman Desire Charnay. Several other expeditions visited the ruins before Frans Blom of Tulane University in 1923, who made superior maps of both the main site and various previously neglected outlying ruins and filed a report for the Mexican government on recommendations on work that could be done to preserve the ruins. From 1949 through 1952 Alberto Ruz Lhuillier supervised excavations and consolidations of the site for Mexico's National Institute of Anthropology and History (INAH); it was Ruz Lhuillier who was the first person to gaze upon Pacal the Great's tomb in over a thousand years. Ruz worked for four years at the Temple of Inscriptions before unearthing the tomb. Further INAH work was done in lead by Jorge Acosta into the 1970s. In 1973, the first of the very productive Palenque Mesa Redonda (Round table) conferences was held here on the inspiration of Merle