Complex sentence: This home represents the wealth of those ironmasters, and after John Dunlop's death, his iron business was rented then bought by other ironmasters in the Valentine family 1815-1879.
Split into simpler sentences: This home represents the wealth of those ironmasters. After John Dunlop's death, his iron business was rented then bought by other ironmasters in the Valentine family 1815-1879.