These letters written over a seven-year period from Pierre Crozat, the famous art collector and royal treasurer, to the 2nd Duke, concern various works of art in the collection of the 2nd Duke and others. It includes reference to works acquired on the 2nd Duke's behalf or sold to him and some of which Crozat commissioned printed versions for collectors and as part of his work on compiling the volumes of his catalogue [Le Recueil Crozat, 1729].
The letters document Crozat's appreciation of the Duke assisting his research and teaching him about other artworks from collections which are in England, as well as his interest in the Duke's art collection. The letters capture Crozat's analysis of certain works of art and his views of their importance in comparision to other works he knows.