St Michael's cemetery was closed to new burials in the last century when it had become full, containing over 2200 graves.
The gravestones were removed in the 1970s as they'd become difficult to maintain. There is a complete list of grave plots here, which includes numbers corresponding to this map to enable you to roughly locate a specific grave.
The old church surrounded by gravestones around 100 years ago:
And now, with the graveyard converted to a conservation area: