This is from Ancestry
https://www.rootschat.com/links/01sj3/If you are unable to open it, it is from ‘Liverpool Church of England Burials 1813- 1975’
‘This volume, though labelled St Martin in the Fields, is in fact a record of burials in St Mary’s Parochial Cemetery, Cambridge Street and has been given a class number in that sequence.’
It doesn’t explain the dates though.