This thread aroused my curiosity and I did some checking as to which bomb ketches were present for the siege. One of the vessels was the HMS Racehorse. The commander and a number of the crew met with a sad fate after Quebec fell.
"The bomb vessel along with the sloop Porcupine (16), under commander John Macartney, were left to winter at Québec. On November 24, the remnants of the French flotilla under the command of Jacques Kanon managed to pass under the guns of Québec and to sail for France. However, during the manoeuvre, the merchantman Elisabeth (10) was stranded on the south shore. On the morning of November 25, commander Miller of the Racehorse with a lieutenant and above 40 men, went on board the Elisabeth and ordering a light to be struck, inadvertently blew up the ship. Most of the party were killed by the explosion and the rest, including the 2 officers, were left in a horrible condition between life and death. Thus they remained till a Canadian, venturing on board in search of plunder, found them, called his neighbours to his aid, carried them to his own house, and after applying, with the utmost kindness, what simple remedies he knew, went over to Québec and told of the disaster. Fortunately for themselves, the sufferers soon died."