SOME idea of the dreadful mortality mow prevalent throughout our city, may be formed from the fact that on yesterday, there were no fewer than thirty-six bodies interred in one grave, or pit, in the pauper department of the cemetery of the Very Rev. Mr. Mathew. These deaths are entirely independent of the numbers occurring in the Workhouse. It has been ascertained that in the last fortnight there were disposed of no less than 300 coffins in the Barrack-street, the greater number of which were required for the parish of St. Nicholas.