My x 3 Great grandmother Amelia Fowler died of Cholera along with her infant daughter in late August 1849.
Both were buried in a mass grave at St. Mary's, Kirkdale, along with approximately thirty (from memory) other Cholera victims over a period of three or so days.
There were also mass burials at St.John's graveyard on St.John's Lane, although these are only two such locations of many.