Probably still alive in 1781: see publication date of 6 Quartets.
This may be Guillaume Denoose, the only Denoose that could be found in the Toulouse registers of that period: born ca.1726 (see marriage registration [Toulouse St-Étienne 1751 f.31]), "musicien" (see birth registration of daughter Jeanne [Toulouse St-Étienne 1752 f.9]), still alive in 1768 at the death of his wife Margueritte Fabry [Toulouse St-Étienne 1768 f.16].
