Complex sentence: John Killigrew (c.1557--1605) of Arwenack, near Falmouth in Cornwall, was three times MP for Penryn in 1584,1586 and 1597, and Vice-Admiral of Cornwall and like his father and grandfather was Captain of Pendennis Castle (1584--98).
Split into simpler sentences: John Killigrew (c.1557--1605) of Arwenack, near Falmouth in Cornwall, was three times MP for Penryn in 1584,1586 and 1597. He was Vice-Admiral of Cornwall and like his father and grandfather was Captain of Pendennis Castle (1584--98).