Given the task definition and input, reply with output. In this task, you will be presented with a text and a pronoun. You should write the name that the pronoun refers to. Position of the pronoun in the text is showed within two "_"s.

Morton also walk ed in major and minor sixth s in the bass, instead of tenths or octaves. He played basic swing rhythms in both the left and right hand. Some of Morton's songs (listed alphabetically): * * * Several of Morton's compositions were musical tributes to himself, including ``Winin' Boy'', ``The Jelly Roll Blues'', subtitled ``The Original Jelly-Roll'', and ``Mr. Jelly Lord''. In the Big Band era, _his_ ``King Porter Stomp'', which Morton had written decades earlier, was a big hit for Fletcher Henderson and Benny Goodman, and became a standard covered by most other swing bands of that time. <sep>, Pronoun: his

Morton