Series statements in v. 4-5 unnumbered.
Includes the letters of Madame Helvétius after her husband's death.
v. 1. 1737-1756, lettres 1-249
v. 2. 1757-1760, lettres 250-464
v. 3. 1761-1774, lettres 465-720
v. 4. 1774-1800, lettres 721-855
v. 5. Quatre nouvelles lettres, errata, additions et modifications ... index et table de matières.
Correspondance générale d'Helvétius by Helvétius. ISBN 0729406164. Published by University of Toronto Press in 1981. Publication and catalogue information, links to buy online and reader comments.