1. Addison, Joseph. The Spectator. Edited by Donald F. Bond, Clarendon P, 1965. 5 vols.
2. Albrecht, W. P. “The Tragic Sublime of Hazlitt and Keats.” Studies in Romanticism, vol. 20, no 2 Summer 1981, pp. 185-201.
3. Barnard, John. “Sun-Spots in Keats’s Epistle ‘To My Brother George.’” Keats-Shelley Memorial Bulletin, vol. 31, 1980, pp. 57-60.
4. Burke, Edmund. A Philosophical Enquiry into Our Ideas of the Origin of the Sublime and Beautiful. Edited by James T. Boulton, U of Notre Dame P, 1968.
5. Cassini, Giovani Domenico. “An Intimation of Diverse Philosophical Particulars, Now Undertaken and Consider’d by Several Ingenious and Learned Men.” Philosophical Transactions of the Royal Society, 1671, pp. 2216-19.