Complex sentence: S & G Gump was founded in 1861 as a mirror and frame shop by Solomon Gump and his brother, Gustav then sold moldings, gilded cornices and European artwork to those recently made wealthy from the California Gold Rush.
Split into simpler sentences: S & G Gump was founded in 1861 as a mirror and frame shop by Solomon Gump and his brother, Gustav. It later sold moldings, gilded cornices and European artwork to those recently made wealthy from the California Gold Rush.