Make a rich baking-powder biscuit dough, and roll it out until it is about two-thirds of an inch thick. Pit and stew enough cherries to make a thick layer of fruit and add sugar to taste. Spread them over the dough thickly and roll it up, taking care to keep the cherries from falling out. Wrap a cloth around it, and sew it up loosely with coarse thread, which is easily pulled out. Allow plenty of room for the dough to rise. Lay the roley-poley on a plate, set it in a steamer and steam for an hour and a half. Serve in slices, with cream or sauce.