The plate for this aquatint is a heavy, pitted sheet of steel that Knight spent a week polishing in an attempt to create a smooth surface. It is now in the National Gallery of Canada's collection thanks to Fred Bolling and Val Withington. The surface imperfections that Knight could not remove have been incorporated into the image with great ingenuity, resulting in one of her masterpieces in the medium. The model has been identified as Miriam Plickta, portrayed here as if she were the twentieth-century equivalent of Jan Vermeer's "Girl with the Pearl Earring". The print has the Latin title "Filia Mundi" because the artist and her printer thought it deserved a grand title.