Book Ten, "The People," a questionnaire may have been used to gather information about the social organization of labor and workers, with questions such as: What is the (trader, artisan) called and why? What particular gods did they venerate? How were their gods attired? How were they worshiped? What do they produce? How did each occupation work? This book also described some other indigenous groups in Mesoamerica. Sahagún was particularly interested in Nahua medicine. The information he collected is a major contribution to the history of medicine generally. His interest was likely related to the high death rate at the time from plagues and diseases. Many thousands of people died, including friars and students at the school. Sections of Books Ten and Eleven describe human anatomy, disease, and medicinal plant remedies. Sahagún named more than a dozen Aztec doctors who dictated and edited these sections. A questionnaire such as the following may have been used in this section: What is the name of the plant (plant part)? What does it look like? What does it cure? How is the medicine prepared? How is it administered? Where is it found? The text in this section provides very detailed information about location, cultivation, and medical uses of plants and plant parts, as well as information about the uses of animal products as medicine. The drawings in this section provide important visual information to amplify the alphabetic text. The information is useful for a wider understanding of the history of botany and the history of zoology. Scholars have speculated that Sahagún was involved in the creation of the Badianus Manuscript, an herbal created in 1552 that has pictorials of medicinal plants and their uses. Although this was originally written in Nahuatl, only the Latin translation has survived. Book Eleven, "Earthly Things," has the most text and approximately half of the drawings in the codex. The text describes it as a "forest, garden, orchard of the Mexican language." It describes the Aztec cultural understanding of the animals, birds, insects, fish and trees in Mesoamerica. Sahagún appeared to have asked questions about animals such as the following: What is the name of the animal? What animals does it resemble? Where does it live? Why does it receive this name? What does it look like? What habits does it have? What does it feed on? How does it hunt? What sounds does it make? Plants and