Complex sentence: His third wife, Elizabeth, was buried at Twyford on 27 April 1629; and his fourth wife, Mary, daughter and coheiress of Thomas Keble of Essex, was buried there on 28 July 1638.
Split into simpler sentences: His third wife, Elizabeth, was buried at Twyford on 27 April 1629. His fourth wife was Mary Keble, daughter Thomas Keble of Essex, and she was buried at Twyford on 28 July 1638.