Membership was banned to monks. Members were ordered to "penetrate into the interior of things in order to know the causes and operations of nature, as it is said the lynx does, which sees not only what is outside, but what is hidden within." Galileo was inducted to the exclusive Academy on April 25, 1611, and became its intellectual centre. Galileo clearly felt honoured by his association with the Academy for he adopted Galileo Galilei Linceo as his signature. The Academy published his works and supported him during his disputes with the Roman Inquisition. Among the Academy's early publications in the fields of astronomy, physics and botany were Galileo's "Letters on Sunspots" and "The Assayer", and the Tesoro Messicano describing the flora, fauna and drugs of the New World, which took decades of labour, down to 1651. With this publication, the first, most famous phase of the Lincei was concluded. The new usage of microscopy, with "references to magnification tools can be found in the works of Galileo and several Lincei, Harvey, Gassendi, Marco Aurelio Severino—who was probably also in contact with the Lincie—and Nathanial Highmore." Domenico Bertoloni Meli, in Mechanism, Experiment, Disease: Marcello Malpighi and Seventeenth-Century Anatomy (Johns Hopkins University Press: 2011; p. 41). Microscopes were not just by the Lincei for astronomical and mathematical work, but were also used for new experimentations in anatomy, as this was the time of the rise of mechanistic anatomy, and the theories of atomism. Experimentation proliferated across the board. Cesi's own intense activity was cut short by his sudden death in 1630 at forty-five. The Linceans produced an important collection of micrographs or drawings made with the help of the newly invented microscope. After Cesi's death, the Accademia dei Lincei closed and the drawings were collected by Cassiano dal Pozzo, a Roman antiquarian, whose heirs sold them. The majority of the collection was procured by George III of the United Kingdom, in 1763. The drawings were discovered in Windsor Castle in 1986, by art historian David Freedberg. They are being published as part of The Paper Museum of Cassiano dal Pozzo. Members Federico Cesi – founder Giovanni Demisiani – Greek theologian, chemist, mathematician, coined name "telescope" Anastasio de Filiis – polymath Johannes van Heeck – Dutch physician Giambattista della Porta – Italian scholar, polymath and playwright Adam Elsheimer – German artist Johann Faber – German physician and botanist, coined name "microscope" Galileo