The collected letters of the eminent Victorian scholar, Thomas Carlyle, and his wife, are available in electronic form in an archive called The Carlyle Letters Online. This resource provides access to more than 10,000 letters of the Carlyles and is based on the print volumes that make up The Collected Letters of Thomas and Jane Welsh Carlyle, published by Duke University Press. The collection is searchable, and browsable by correspondent, subject, and date. An excellent list of works about Thomas Carlyle can be found in the resource Oxford Bibliographies.