E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Corbeaux.
Bearers, i.e. persons who carry the dead to the grave; mutes, etc. So called from the corbillards, or coches deau, which went from Paris to Corbeil with the dead bodies of those who died in the 16th century of a fatal epidemic.
1
Jai lu quelque part que ce coche [the Gorbillard] servit, sous Henri IV., a transporter des morts, victimes dune épidémie de Paris à Corbeil. Le nom de Corbillard resta depuis aux voitures funèbres.Alf. Bonnardot.