Claim: Robert Browning lacked mastery of the persona poem.
Evidence: Robert Browning -LRB- 7 May 1812 -- 12 December 1889 -RRB- was an English poet and playwright whose mastery of the dramatic monologue made him one of the foremost Victorian poets.
Dramatic monologue , also known as a persona poem , is a type of poetry written in the form of a speech of an individual character.