Authentic Galileo materials in North America / Stillman Drake.
Abstract:
Five autograph letters of Galileo unknown to Antonio Favaro exist in Canada and the United States, as well as contemporary copies of manuscripts of Galileo's Compasso, Cosmografia, and Le Meccaniche with variants from the texts published in the Opere. The only known complete text of Galileo's letter to Gallanzone Gallonzoni of 16 July 1611 and a variant copy of his 1615 letter to Christina of Lorraine are now in Toronto, as is the letterbook of Girolamo Magagnati containing several letters to Galileo. Facsimiles of two autographs and a bibliography of references are included in the present paper
Nuncius A. 5, fasc. 2 (1990), p. 221-228