Final answer:
In the play 'The Crucible', John Proctor accuses Mary Warren of falsely accusing Abigail Williams of murder.
Step-by-step explanation:
In the context of English literature, the phrase 'Mary-you charge a cold and cruel murder on Abigail' is a line from the play 'The Crucible' by Arthur Miller. This line is spoken by John Proctor to Mary Warren, accusing her of falsely accusing Abigail Williams of murder. John Proctor is essentially saying that Mary is making a serious and untrue accusation against Abigail.