I found a death record for my ancestor Joseph Daugherty (Dougherty) who died in Jan. 1875. Says he was buried in St. Mary's. I checked St. Mary's in Lawrencville, not there. I know he originally lived in Southside but may have moved elsewhere in the city of Pittsburgh by time of death. The street name of residence on the record is hard to read, looks like Sair St. or Sain Street but no luck googling that. I am not sure which St. Mary's to check next, there are so many!