Complex sentence: Her father, Benjamin Mayson, died when she was four years old and in 1843 her mother, Elizabeth Jerram, married Henry Dorling, a widower with four children of his own.
Split into simpler sentences: Her father, Benjamin Mayson, died when she was four years old. In 1843, her mother, Elizabeth Jerram, married Henry Dorling, a widower with four children of his own.