Sea Biscuits (Hardtack)

3 cups wheat flour
1 cup white flour
1 tsp. salt
water (amount varies)

Mix dry ingredients. Add water (amount of water varies depending on how you measured the flour, and even the humidity); stir until a firm, non-sticky dough forms. Roll dough out thin, about 1/4 inch thick, and roll it up into a tube, like you would for cinnamon rolls or jelly rolls. Beat it down for several minutes, then fold it and repeat for several more times. Then roll it out very thick (around 1 inch thick) and cut into round biscuits using a biscuit cutter (or using the top of a drinking glass). Place on an un-greased cookie sheet. Poke the biscuits on the top, very deeply, several times with a knife. Bake for about 2 hours at 350 degrees.