Complex sentence: Parkyns was educated at Woolwich and at Trinity College, Cambridge, but he did not finished his education there because when Parkyns was only nineteenth years old, he decided to leave England and head to Africa.
Split into simpler sentences: Parkyns was educated at Woolwich and at Trinity College, Cambridge, but he did not finished his education there. When Parkyns was nineteenth years old, he decided to leave England and head to Africa.