Gettin' more authentical, here's a link to the poem as printed in the tenth edition (1903) of Chittenden's collection Ranch Verses, first published in 1893.
http://books.google.com/books?id=e2FCAAAAYAAJ&pg=PA12

William Lawrence Chittenden was originally a newspaper journalist who went to Texas from New York, so the dialect is about as authentic as the Irish dialect in Tin Pan Alley songs--not that it matters. He later settled in Bermuda (winters) and Maine (summers).