| Letters to his wife Mary Borrow
George Borrow | |
| Letters to Judd, an American Workingman
Upton Sinclair | |
| Letters to Madame Hanska, born Countess Rzewuska, afterwards Madame Honoré de Balzac, 1833-1846
Honoré de Balzac | |
| Letters to Persons Who Are Engaged in Domestic Service
Catharine Esther Beecher | |
| Letters to Severall Persons of Honour
John Donne | |
| Letters to Sir William Windham and Mr. Pope
Viscount Henry St. John Bolingbroke | |
| Letters to the Clergy on the Lord's Prayer and the Church
John Ruskin | |
| Letters Written During a Short Residence in Sweden, Norway, and Denmark
Mary Wollstonecraft | |
| Letters written in France, to a friend in London, between the month of November 1794, and the month of May 1795
Watkin Tench | |
| Letters, sentences and maxims
Earl of Philip Dormer Stanhope Chesterfield |
