Complex sentence: During the period when the alleged child was born, Calamity Jane was working as a scout for the army, and at the time of Hickock's death, he was newly married to Agnes Lake Thatcher.
Split into simpler sentences: During the period that the alleged child was born, Calamity Jane was working as a scout for the army. At the time of his death, Hickok was newly married to Agnes Lake Thatcher.