v. 1. Letters 1819-1837
v. 2. Letters 1837-1845
v. 3. Letters 1845-1855
v. 4. Letters 1856-1862
v. 5 Letters 1863-1876.
The collected letters of Harriet Martineau by Harriet Martineau. ISBN 9781851968046. Published by Pickering & Chatto in 2007. Publication and catalogue information, links to buy online and reader comments.