At some point, he befriended Elizabeth Wilmot of Rochester, countess of Sandwich, and Jacques Paisible who were visiting James II of England in his exile at Saint-germain-en-Laye near Paris.
The earliest document to refer to the composer is a parisian tax roll dated 1695 where he is said mastering the harpsichord and other instruments.
After 1712 he was mostly active as a teacher, although his music was still performed in concerts until at least 1726, and he was apparently a regular member of the Drury Lane orchestra.
According to music historian John Hawkins, whose work is the most important source on Dieupart's biography, the composer died at a very advanced age and in poverty.
[1] This information has recently turned to be false, for archives documents show he married in Melun, near Paris, in 1744 and died at Saint-Germain-sur-Ecole, a small village nearby, in 1751.
The music represents a highly successful synthesis of French, Italian and English styles, married with imaginative harmony.