Complex sentence: On May 29,1935, a shipment of Cotswold Stone Roofing Slate arrived from England, thicker, heavier and lighter in color than Virginia Buckingham Slate, and were used to emphasize the height of the steep roof.
Split into simpler sentences: On May 29,1935, a shipment of Cotswold Stone Roofing Slate arrived from England. Thicker, heavier and lighter in color than Virginia Buckingham Slate, the Cotswold slate was used to emphasize the height of the steep roof.