Stir in, while it is hot, enough flour to make a tolerably thick
batter. Add half a gill of yeast, and let it rise five or six hours.
If you make it over night you need not add the yeast, but put in,
instead, a tablespoonful of white sugar. In the morning, stir into
the sponge a tablespoonful of soda, dissolved in hot water, a little
salt, and two tablespoonfuls melted butter. Work in just flour enough
to enable you to handle the dough comfortably; knead well, make into
loaves, and let it rise until light.
This makes very white and wholesome bread.