Complex sentence: Lewis Llewelyn Dillwyn (L.W.D. 's son) ran the pottery from 1836, he bought out the neighbouring Glamorgan Pottery in 1838.
Split into simpler sentences: Lewis Llewelyn Dillwyn (Lewis Weston Dillwyn's son) ran the pottery from 1836. He bought out the neighbouring Glamorgan Pottery in 1838.