"Nanny Ogg?" She tilts her head and peers up at him curiously through her sunglasses, her voice the kind of puzzled that expresses 'it rings a bell, but I can't identify which corner in the house of my memory that bell is being rung in'.

"And," she taps her till one last time and waits for the receipt to release, "well yes, models are very essential. Artists that work without any just will produce no good results."