Who is Pea Eye Parker from Lonesome Dove and what is their importance?

Pea Eye Parker is a Corporal for many years in Captain Call's employ. Pea Eye is a Ranger that can be counted on. A tall and lanky man, he likely had never been full a day in his life. He had an awkward look about him, appearing helpless most of the time, but that couldn't be farther from the truth. He wasn't what anyone would have called a true Indian fighter, but given a task like carpentry or blacksmithing, or digging or just about any other kind of labor, Pea Eye was one of the best for the job. Call wouldn't have tolerated anything less, but Pea Eye was