He had known several men who had lost limbs in battle; the men all claimed that they still felt things in the place where the limb had been. It was natural enough, then, that with Bill suddenly gone he and Gus would continue to have some of the feelings that went with friendship, even though the friend was gone.
In "Lonesome Dove," the narrative explores the emotional impact of loss through the connection between the characters. The protagonist reflects on how men who have lost limbs in war still feel sensations in those missing parts. This phenomenon illustrates a deep, lingering connection to what has been lost, serving as a metaphor for the enduring nature of friendships.
With Bill's sudden absence, the characters, particularly Gus, are reminded of their bond and continue to experience feelings associated with their friendship. This reflects the idea that the emotional ties we form do not simply vanish; rather, they remain, shaping our experiences even in the face of grief and separation.