Remove black skin from sole and then cut off tail and head. Measure butter. Chop parsley finely. Season fish with salt and pepper and lightly coat in flour. Place 1/4 cup of fresh butter in a pan on a moderate heat and when hot add the fish -- cook 2 minutes on each side. Place parsley in tea towel -- dampen tea towel and ring out excess moisture. Place sole (after filleting) onto a serving dish. Sprinkle with dampened parsley. Add the rest of the butter and lemon juice to pan. Heat until just browned and pour over the fish. Serve immediately.