Wipe and cut meat from fore-quarter of mutton in one-inch pieces; there should be three cupfuls. Put in kettle, cover with cold water, and bring quickly to boiling point; drain in colander and pour over one quart cold water. Return meat to kettle, cover with one quart boiling water, add three onions cut in slices, one-half teaspoon peppercorns, and a sprig each of thyme and parsley. Simmer until meat is tender, remove meat, strain liquor, and thicken with one-fourth cup each of butter and flour cooked together; to the flour add one-half tablespoon curry powder, one-half teaspoon salt, and one-eighth teaspoon pepper. Add meat to gravy, reheat, and serve with border of steamed rice.