Complex sentence: When he started his acting career Coxen dropped'Albert' and became, Edward, Eddie or Ed Coxen and in 1909 he returned to New York, this time as an established 29-year-old actor performing at Wallack's Theatre, Broadway.
Split into simpler sentences: When he started his acting career, Coxen dropped "Albert" as his first name and was often billed as Edward, Eddie or Ed Coxen. In 1909, he returned to New York, this time as an established 29-year-old actor performing at Wallack's Theatre, Broadway.