French portrait drawing from 'le directoire'.

Here's a portrait drawing from my collection. Pencil on light grey paper. 14.9 cm x 12.3 cm. Probably French from when 'le directoire' ruled France (1795-1799). At that time nudity was in fashion as an expression of freedom after the revolution. No wonder several ladies succumbed to pneumonia. This one still looks healthy. Unfortunately I neither know the name of the lady nor the name of the artist. So I hope for your help !