In July 1800 the 14-gun cutter _Viper_, commanded by acting-Lieutenant Jeremiah Coghlan, was attached to Sir Edward Pellew's squadron off Port Louis. Coghlan, as his name tells, was of Irish blood. He had just emerged from the chrysalis stage of a midshipman, and, flushed with the joy of an independent command, was eager for adventure. The entrance to Port Louis was watched by a number of gunboats constantly on sentry-go, and Coghlan conceived the idea of jumping suddenly on one of these, and carrying her off from under the guns of the enemy's fleet. He persuaded Sir Edward Pellew to lend him the flagship's ten-oared cutter, with twelve volunteers. Having got this reinforcement, and having persuaded the _Amethyst_ frigate to lend him a boat and crew, Mr. Jeremiah Coghlan proceeded to carry out another and very different plan from that he had ventured to suggest to his admiral. A French gun-brig, named the _Cerbere_, was lying in the harbour of St. Louis. She mounted three long 24 and four 6-pounders, and was moored, with springs in her cables, within pistol-shot of three batteries. A French seventy-four and two frigates were within gunshot of her. She had a crew of eighty-six men, sixteen of whom were soldiers. It was upon this brig, lying under three powerful batteries, within a hostile and difficult port, that Mr. Jeremiah Coghlan proposed, in the darkness of night, to make a dash. He added the _Viper's_ solitary midshipman, with himself and six of his crew, to the twelve volunteers on board the flagship's cutter, raising its crew to twenty men, and, with the _Amethyst's_ boat and a small boat from the _Viper_, pulled off in the blackness of the night on this daring adventure.