Complex sentence: Hornigold's early life is unrecorded, though it is possible he was born in Norfolk, England, and, if so, he might have first served at sea aboard ships whose home port was either King's Lynn or Great Yarmouth.
Split into simpler sentences: Hornigold's early life is unrecorded, although it is possible he was born in the English county of Norfolk. If so, he might have first served at sea aboard ships whose home port was either King's Lynn or Great Yarmouth.