In a large bowl, mix together the flour, yeast and salt.
Add the water and stir until blended; dough will be shaggy and sticky.
Cover bowl with plastic wrap. Let dough rest at least 12 hours, preferably about 18, at warm room temperature.
Dough is ready when its surface is dotted with bubbles. Lightly flour a work surface and place dough on it; sprinkle it with a little more flour and fold it over on itself once or twice.
Cover loosely with plastic wrap and let rest about 15 minutes.
Using just enough flour to keep dough from sticking to work surface or to your fingers, gently and quickly shape dough into a ball. Generously coat a cotton towel (not terry cloth) with flour, wheat bran or cornmeal; put dough seam side down on towel and dust with more flour, bran or cornmeal. Cover with another cotton towel and let rise for about 2 hours.
Preheat oven to 450°F. Put a 6- to 8-quart heavy covered pot (cast iron, enamel, Pyrex or ceramic) in oven as it heats.
When pot is heated, carefully remove it from oven. Slide your hand under towel and turn dough over into pot; it may look like a mess but that is OK.
Shake pan once or twice if dough is unevenly distributed; it will straighten out as it bakes.
Cover with lid and bake 30 minutes, then remove lid and bake another 15 to 30 minutes until loaf is beautifully browned.