This was fairly local to me. As a child I can still remember children singing skipping rhymes, 80 years after the case.
Mary Ann Cotton,
She's dead and she's rotten,
She lies in her bed with her eyes wide oppen (open).
Sing, sing, What shall I sing?
Mary Ann Cotton is tied up with string.
Where, where?
Up in the air,
Selling black puddings a penny a pair.