Lord Duncan first appeared in Lloyd's Register (LR) in the volume for 1799.

[1] The French privateer Brave captured Lord Duncan, Lyon, master.

Lord Duncan, Robert Lyon, master, was carrying a cargo of sugar, rum, coffee, and cotton, from Antigua to Glasgow.

[2] However, the cutter Viper recaptured Lord Duncan, which arrived at Falmouth.

[5] On 28 February 1804 Lord Duncan was on her way from London to St Vincents and in the latitude of Barbados when she encountered the French privateer Grand Decidé.