Reverend Comyn conducted the service from the quarterdeck of the Vanguard, which made a great impression on a group of captured French officers.
[3] After the battle the Vanguard headed for Palermo in Italy, where Nelson encountered Emma Hamilton and the crew languished there inactive for several months.
On 5 June 1799, Nelson shifted his flag to HMS Foudroyant, with Captain Hardy and five lieutenants, and Comyn accompanied them until 1800.
In Spring 1801 the British Fleet was in the Baltic for the attack on the Danes at Copenhagen where Comyn was chaplain on Nelson's ship, HMS St George.
His great nephew William Leslie Comyn was a pioneer builder of concrete ships in California during the First World War.