Complex sentence: On July 4,1878, he married Clara Lovering in Alton; their son, Robert Lovering Mudgett, was born on February 3,1880, in Loudon, New Hampshire.
Split into simpler sentences: On July 4,1878, he married Clara Lovering in Alton. Their son, Robert Lovering Mudgett, was born on February 3,1880, in Loudon, New Hampshire.