Two volumes, third edition 1817. Half bound with brown leather ridged and decorated spines and corners and brown buckram boards. The spine of vol I is completely detached and that of vol II is only attached at the lower half of the rear hinge. The front board of vol I is partly detached, the front board of vol II is fully attached but loose. Both volumes have edge and corner wear. The front board of vol I and the back board of vol II are unevenly sunned. The front board of vol II has several small superficial splash marks. Marbled endpapers and page edges. The binding of the text blocks is still tight and the back boards are still firmly attached with no cracked hinges. Both volumes have a small pasted square on the front pastedowns stating ‘Maudsley Bequest’ and both have small rubber stamps on the second free endpapers and the title pages ‘Pathological Laboratory Maudsley Hospital’. Volume I has two small owner names, J Maudsley 1821 and H Maudsley M.D. 1859 on the second free endpaper and a short note in pencil on the title page. The apparent owner of these volumes, Henry Maudsley 1835-1918, was a pioneering British psychiatrist, commemorated in the Maudsley Hospital in London and in the annual Maudsley Lecture of the Royal College of Psychiatrists. In 1907 he donated £30,000 to found the Maudsley Hospital in London. The work is translated from the original French of M. De Mirabaud. An early nineteenth century philosophical study of nature, natural laws, intellect, morals, theology, divinity, atheism. These two volumes are now 200 years old, internally they are very good but the original covers are fair.