How has the author described Jim Baker?

The author describes Jim Baker as a "middle-aged, simple-hearted miner" who once lived in the California woods. According to the author, Jim Baker can understand any remark made by an animal or human being. He is portrayed as a larger-than-life character, a satirized version of the rugged individualist who boasts skills beyond the ability of the average person.
The character of Jim Baker can be found in Mark Twain's A Tramp Abroad. In the book, Baker is portrayed as an animal whisperer of sorts. According to Jim Baker, all animals can talk to each other. Some animals have only a limited vocabulary, while others boast more extensive skills. The latter has a "fine command of language and a ready and fluent delivery." Jim maintains that the bluejay is more articulate than any other animal.
According to Jim, bluejays can put anything they feel into language. Bluejays are said to be extremely well-educated. Jim believes that these birds are never stumped for words. In fact, he argues that bluejays use better grammar than any other animal. It is only very rarely that one will catch a bluejay using terrible grammar. When it does happen, the bluejay is said to be so ashamed that it will try to make itself scarce. Jim asserts that the bluejay is "everything that a man is."