In Guatemala, Maudslay began the major archaeological work for which he is best remembered. He started at the Maya ruins of Quirigua and Copan where, with the help of Frank Sarg, he hired labourers to help clear and survey the remaining structures and artefacts. Sarg also introduced Maudslay to the newly found ruins in
Tikal and to reliable guide Gorgonio López. Maudslay was the first to describe the site of
Yaxchilán. With
Teobert Maler, Alfred Maudslay explored
Chichén in the 1880s and both spent several weeks at the site and took extensive photographs. Maudslay published the first long-form description of Chichen Itza in his book,
Biologia Centrali-Americana. In the course of his surveys, Maudslay pioneered many of the later archaeological techniques. He hired Italian expert
Lorenzo Giuntini and technicians to make plaster casts of the carvings, while
Gorgonio López made casts of papier-mâché. Artist
Annie Hunter drew impressions of the casts before they were shipped to museums in England and the United States. Maudslay also took numerous detailed photographs –
dry plate photography was then a new technique – and made copies of the inscriptions. All told, Maudslay made a total of six expeditions to Maya ruins. After 13 years of preparation, he published his findings in 1902 as a 5-volume compendium entitled
Biologia Centrali-Americana: Archaeology. One volume of text describes the four volumes of photographs, site plans, and color drawings of Maya ruins. At Maudslay's request, an interpretation of Maya calendar glyphs by
Joseph Thompson Goodman was added as an appendix. The accuracy and attention to detail set a standard for future archaeological reports. Maudslay also applied for permission to make a survey of
Monte Albán in
Oaxaca but when he finally received permission in 1902, he could no longer finance the work with his own money. The firm of
Maudslay, Sons and Field had gone bankrupt and reduced Maudslay's income. He unsuccessfully applied for funding from the
Carnegie Institution. The Maudslays moved to
San Ángel near Mexico City for two years. In 1905, Maudslay began to translate the memoirs of
Bernal Díaz del Castillo, who had been a soldier in the troops of the conquistadors; he completed it in 1912. In 1907 the Maudslays moved permanently back to Britain. Maudslay become a President of the
Royal Anthropological Institute 1911–12. He also chaired the 18th
International Congress of Americanists in London in 1912. ==Personal life==