Complex sentence: On the 19th, when the ship's crew on the "Rose" was told that the captain had planned to take the ship to France to join the exiled James, a struggle ensued, and the Protestants among the crew took down the ship's rigging.
Split into simpler sentences: On the 19th, however, the crew on the "Rose" was told that the captain had planned to take the ship to France to join the exiled James. A struggle ensued, and the Protestants among the crew took down the ship's rigging.