Who is Jake Spoon from Lonesome Dove and what is their importance?

Jake Spoon had eyes the color of coffee that somehow gives him a sorrowful expression the ladies were drawn to like flies. He sports a small mustache, and his curly black hair is interrupted by a sizable bald spot on top. He prides himself on pretty horses, but has a mind that is slow to work. He prefers the easy way, and there is something about him that doesn't ring quite right with either Call or Gus, although they both would admit that they liked him well enough. A gambler and a rascal through and through, Jake does whatever he has to in order to get by, and nothing more. He looks for the easy way.