 After singing in London at the Drury Lane theatre in the years 1843-1844, Duprez began to cut back on his stage performances, with a notable exception being the lead role in Giuseppe Verdi's "Jérusalem".His last public appearance was in 1851 in "Lucia di Lammermoor" at the Théâtre des Italiens.He then devoted himself to teaching, first at Paris's Conservatoire (where he had been appointed to a professorship as far back as 1842), and afterwards privately.