Twenty minutes
to four
He spoke with a hard emphasis , smiling , and slapping the breast of his coat . Watson looked at him and said no more . Fenwick walked rapidly along the Quai Voltaire , crossed the Pont Neuf , and found himself inside the enclosure of the Louvre . Twenty minutes to four . Some impulse , born of the seething thoughts within , took him to the door of the Musée . He mounted rapidly , and found himself in the large room devoted to the modern French school . He went straight to two pictures by Hippolyte Flandrin -- ` Madame Vinet ' and ` Portrait de Jeune Fille . '