Delambre, Histoire de l'Astronomie; Arago, Histoire de l'Astronomie; Life of Galileo, in Cabinet Library; Life of Galileo, by Brewster; Lives of Galileo, by Italian and Spanish Literary Men; Whewell's History of Inductive Sciences; Plurality of Worlds; Humboldt's Cosmos; Nichols' Architecture of the Heavens; Chalmers' Astronomical Discourses; Life of Kepler, Library of Useful Knowledge; Brewster's Life of Tycho Brahe, of Kepler, and of Sir Isaac Newton; Mitchell's Stellar and Planetary Worlds; Bradley's Correspondence; Airy's Reports; Voiron's History of Astronomy; Philosophical Transactions; Everett's Oration on Galileo; Life of Copernicus; Bayly's Astronomy; Encyclopaedia Britannica, Art. Astronomy; Proctor's Lectures.