Which line from Chapter One of Jack London’s The Call of the Wild contains dialect?

"He's no slouch at dog-breakin', that's wot I say," one of the men on the wall cried enthusiastically.
He lay where he had fallen, and from there he watched the man in the red sweater.
"'Answers to the name of Buck,'" the man soliloquized, quoting from the saloon-keeper's letter which had announced the consignment of the crate and contents.
As he spoke he fearlessly patted the head he had so mercilessly pounded, and though Buck's hair involuntarily bristled at touch of the hand, he endured it without protest.