Complex sentence: In 1926 he began a successful career as a stills photographer with producer Herbert Wilcox and after this, First National of America in France and England, and Welsh Pearson films in 1927.
Split into simpler sentences: In 1926 he begun a successful career as a stills photographer with producer Herbert Wilcox. After this, First National of America in France and England, and Welsh Pearson films in 1927.