I keep coming back to this family in 1861 living at 2, Kentfield Place, St Pauls, Greenwich. The age for Edward fits with the age given in the newspapers (40) but not in the trial report(30) - one must be wrong.
David Callaghan 36 Agricultural Labourer Ireland
Julia Callaghan 32 Labourer Ireland
Mary Callaghan 12 City of London, Middlesex
John Callaghan 10 Deptford, Kent
Edward Callaghan 6 Deptford, Kent
Anne Callaghan 2 Deptford, Kent