Between 1800 and 1926 there was no province-wide death registry in Quebec.Therefore, it is difficult to locate death records, unless there has been a death and burial repertory published for the applicable parish.Some were produced for no more than 10 per cent of the parishes to my knowledge.
Let me help you wtih Louis Maurice Pepin and Judith Laroche.
a. Jean-Baptiste Daniel born 8 bapt. 9 Jul 1807, Three-Rivers, Imm. Concept. He died on 7th and was buried on 9 JUn 1807, same parish
b. Judith born 1 bapt 2 May 1802, same parish.
c. another Judith born 19 bapt. 19 jul 1912, same parish.
I also have a Augustin, aged 22, who died on dJan 1846, St-Marc-sur-Richelieu.Same parents as above but could be a different couple.He would have been born in 1824.