13.11.1793 Dupont at Holcroft's should read Duport. In Godwin's 1796 list for 1793 and in 1794 version. (Check writing of these entries).
Jean Pierre Duport 1741-1818 French cellist (Grove) Rather than the cellist this is likely to have been the politician Adrien Jean Francois Duport 1759-1798 an associate of Lameth (see Lameth, Charles) who escaped to England about September 1792 (Dictionnaire de Biographie Francaise). He is also mentioned in Brightwell: Amelia Opie p56