To Mary, to Hogg, and to Moore, Medwin owes a great mass of his book, having freely plundered Mary's notes and prefaces to her collections of Shelley's poetry and prose, Hogg's inimitable articles in The New Monthly Magazine, and Moore's editions of Byron. De Quincey's articles in Tait's Magazine yielded him substantial assistance; and from his own books he naturally swept together all he could make available. As to indicating what is new and what old, what is his and what is other people's, he may be called without fear of contra diction the champion defaulter.