Complex sentence: Joseph taught her the brand's famous' cabbage rose' motif and other secret painting techniques he had learnt from his father and when he passed away in 1952, Esther became Head Decorator and continued to paint Wemyss Ware until the Bovey Pottery closed down in 1957.
Split into simpler sentences: Joseph taught her the brand's famous' cabbage rose' motif and other painting techniques he had learnt from his father. When Josef died in 1952, Esther became Head Decorator and continued to paint Wemyss Ware until the Bovey Pottery itself closed down in 1957.