Complex sentence: She had a studio in Southampton Row and another in Newmarket, where she painted racehorses, building a reputation among the sporting fraternity, painting both animals and portraits of jockeys, including Frederick Archer.
Split into simpler sentences: She had a studio in Southampton Row and another in Newmarket, where she painted racehorses, building a reputation among the sporting fraternity. She painted both animals and portraits of jockeys, including Frederick Archer.