Possible Clues:

• Proof first date Enid would express about
• In court its given to plunge up to begin with
• Study in English sin providing proof
• Exhibit A, etc.
• Proof of French shown during show
• Show English immorality centred on illicit meeting-place
• Witness's testimony
• Traces: those of love revealed by Shirley Ann Grau and Dan Jacobson
• The basic necessity for a suit
• Start to take up the plunge and give it, just in case