30 years ago I bought an oil painting at an auction- It was part of the Henry and Edith Rock collection. It is titled "A Road in Paris" It is on the original stretcher but was re-framed by the Rocks. It is a landscape. The signature is very hard to read in a dark area of the painting but looks like"Flahaut".
The only Flahaut I have read about is
Born in : Saint-Just-en-Chaussée -
Comte :
Surintendant des Bâtiments : France from 1774 to 1789

Charles-Claude Flahaut de la Billaderie, comte d'Angiviller (1730 — 1810), was the director of the Bâtiments du Roi, a forerunner of a minister of fine arts in charge of the royal building works, under Louis XVI of France, from 1775. Through him virtually all official artistic patronage flowed. His portrait by Joseph-Siffred Duplessis, 1779, is conserved at the Musée du Louvre.

Was he the artist?