Complex sentence: On June 27,1865, he learned, from a prize "Susan & Abigail", of General Robert E. Lee's surrender when her captain produced a San Francisco newspaper reporting the flight from Richmond, Virginia, of the Confederate Government 10 weeks previously.
Split into simpler sentences: On June 27,1865, he learned from a prize, the "Susan & Abigail", that General Robert E. Lee had surrendered. Her captain produced a San Francisco newspaper reporting the flight from Richmond, Virginia, of the Confederate Government 10 weeks previously.