Parker House Tomato Soup

Put into a saucepan five pounds of tomatoes, either fresh or canned,
with one quart of water, salt, pepper, cayenne, one and one-half
tablespoonfuls of sugar, and three ounces of butter, rubbed into one
heaping tablespoonful of flour. Cook slowly one hour. Remove from the
fire and rub through a sieve. Place over the fire again and add one
and one-half tablespoonfuls of rice flour which has been dissolved in
a little water. Let it come to a boil, when it is ready to serve.