Lady Writing a Letter with her Maid painting's canvas was almost certainly cut from the same bolt used for "Woman with a Lute". "Lady Writing a Letter with her Maid" is the first of the artist's experiments with centrifugal composition; where the focus is not only from the centre of the canvas. In addition, it is his third work in which the drama and dynamic is not centred on a single figure. The maid is shown standing in the mid-ground, behind her lady, with her hands crossed and waiting for the letter to be completed. The positions of their bodies indicate that the two women are disconnected.
Letter on the Blind people associated with the "Encyclopedia" led to his liberation after few months. Letter on the Blind In Letter on the Blind for the Use of those who can see (French: Lettre sur les aveugles à l'usage de ceux qui voient), Denis Diderot takes on the question of visual perception, a subject that, at the time, experienced a resurgence of interest due to the success of medical procedures that allowed surgeons to operate on cataracts (demonstrated in 1747 by Jacques Daviel) and certain cases of blindness from birth. Speculations were then numerous upon what the nature and use of vision was,