Joan had something to conceal, and Jenny Prask was determined that she should disclose it, and Jenny Prask held the means by which to force her.
"But that's just what I am driving at," continued Martin.

"We can't afford to be gentle here.

There's no lie Jenny Prask wouldn't tell to force Joan into the witness box.

We have got to deal relentlessly with Jenny Prask.

A woman's voice spoke from this house over the telephone to London at a quarter-past twelve last night, and said that Stella was dead.