But whilst his political efforts did their work in his lifetime, his literary labours are the basis of his present fame. These were almost all produced after his sixtieth year; "Robinson Crusoe," by far the most popular of all his writings and one of the most popular in all the world's literature, "The Dumb Philosopher," "Captain Singleton," "Duncan Campbell," "Moll Flanders," "Colonel Jacque," "The Journal of the Plague," "The Memoirs of a Cavalier," "The Fortunate Mistress; or, Roxana," "The New Voyage round the World," and "Captain Carleton." The life and fidelity to human nature with which these are written have continually led readers to believe them altogether real narratives. The "Journal of the Plague" was quoted as a relation of facts by Dr. Mead; Chatham used to recommend "The Memoirs of a Cavalier" as the best account of the Civil War; Dr. Johnson read the life of "Captain Carleton" as genuine, and we continually see the story of "Mrs. Veal's Ghost," written by Defoe to puff Drelincourt's heavy "Essay on Death," included in collections as a matter-of-fact account of an apparition. This quality of verisimilitude is one of the greatest charms of his inimitable "Crusoe," which is the delight of the young from age to age. Amongst the prose writers of this period a lady stands prominent, Lady Mary Wortley Montagu (_b._ 1690; _d._ 1762), the daughter of the Duke of Kingston, and mother of Lady Bute, the wife of the Earl of Bute, the celebrated Minister of George III. Lady Mary derives her chief fame from her Letters, which were not published till after her death. They are as remarkable for their wit, brilliancy, and clear, thorough sense, as any of the writings of the age. In these we have a most graphic picture of life in the East, as she had lived some years at Constantinople with her husband. She thence conferred one of the greatest boons on her country, by the introduction of inoculation for the smallpox. Lady Mary translated the "Enchiridion of Epictetus," and wrote many verses, including satirical ones, called "Town Eclogues;" but her fame must always rest upon her clear and sparkling letters. She was celebrated for her wit and beauty, and was a leading figure in the fashionable as well as the literary world. Pope and she were long great friends, but quarrelled irreconcilably.