Possible Clues:

• Time to stop a curiously old-fashioned etching technique
• Etching or watercolour?
• A whimsical setting for introduction of this art work
• A cat's tail spotted in whimsical etching
• Spanning entrance to theatre is a charmingly old-fashioned etching
• A time portrayed in olde-worlde sort of engraving
• Incident finally captured in a picturesque print
• … Tory leader depicted in a charmingly old-fashioned print
• Etching method
• Work of art finally put in a pleasingly old-fashioned frame