This is an adaptation of a bread called pain à l’ancienne (old-fashioned bread) from the book Pains Spéciaux et Décorés (Special and Decorated Breads) (Editions St.-Honoré) by Alain Couet and Erich Kayser.
To make the sponge, place the water in a mixing bowl and whisk in the yeast. Stir in the flour smoothly. Cover the bowl with plastic wrap and allow the sponge to rise at room temperature for about 8 hours, or overnight, until tripled in volume. If the temperature is warm, allow the sponge to rise until tripled, then refrigerate for the remainder of the 8 hours.