Surely we need also to re-read this climactic scene in Chapter 73, where Ennis finally comes face to face with Justin Worrell:
Ennis went into the barn, making his way through the gloom, turning on lights as he passed the stables, pausing at one where a new purchase, whom he had named “Nellie” because he was constantly saying “Whoa Nellie” when she reared, was pawing the floor of her stall impatiently, snorting from time to time. He patted his hand against the inside of the door to calm her, but it seemed to have the opposite effect and he saw her rear, the wide pink rims of her eyes as she glared at him. Nellie was having a hard time with mere confinement in a stall, it would seem. As he got past Nellie’s stall he heard a low sound... the snick of a bolt on a rifle, and a shadow separated itself at the end of the row of stalls.
“Stay right there, boy,” said a low, menacing voice.
Ennis stared into the gloom as Worrell stepped out, moving back against the door of Nellie’s stall, hearing her paw the floor once more in agitation. “What a you want, Worrell ? That’s yer name, ain’t it?”
He saw a flicker of a smile on the pale face, the wisps of blond hair under the wide black brim of his hat, the rifle aimed at his chest. “That’s my name, but I’m askin the questions. Why is Cantrell huntin me?”
“You... killed my man,” Ennis said, throat dry, hand rasping against the door of the stall, a helpless anger rising in him.
Worrell blinked. “Evelyn Wyatt?”
Ennis shook his head. Even at this distance, he could see the resemblance between them – the thin cheeks, the high forehead, but the clothes, the manner, the body language, even the voice and accent, markedly different... “No. Jack Twist.”
A smile flashed as Worrell took a step nearer. “Oh. Blue Eyes. Nice lookin guy, that Blue Eyes. Looks like he never got over ya.... you look a whole lot like me. Who are you, by the way?”
“My name is Del Mar. Ennis Del Mar.”
“Yeah, Blue Eyes an me... Jack you say. Yeah that was his name... nice lookin guy, too bad he had such a big mouth,” the voice chuckled. He seemed unworried, arrogant, almost gloating.
“You killed em.”
“Yeah well, some live, some die. He had ta die. Should know better than ta pick up a loud mouth salesman."
“That why ya did it? Cause you was afraid he was gonna tell yer secret?
The Ennis in the black hat nodded, taking another step closer, rifle still trained on Ennis’s chest. “I told em... an that’s what happens when ya can’t keep yer mouth shut, see, Del Mar. Now you got yer new boyfriend askin questions he shouldn’t ask, diggin around, so I had ta go huntin again. But now yer in the way too, so ---“
Ennis’s hand had tightened on the latch of Nellie’s stall as Worrell stepped nearer, and at his last step, he let the door swing free with a loud “Giddyap!” and Nellie bolted from the stall as Ennis dove behind it and dodged down the row of stalls, away from Worrell. He heard the shriek of the wild yearling, the crash of kicking hooves against the door, and the explosion of the rifle as it went off, a blur of brown color as Nellie dashed down to the opposite end of the stables, pawing at the floor of a far corner, snorting. And silence.
Ennis turned and made his way back, pressing himself against the doors of the stables, and stepped around Nellie’s door as he heard a loud groan. Worrell lay on the floor, blood staining his shirt, the rifle knocked from his hand. He grabbed the rifle, looking down. Worrell was still breathing, but in pain... he looked as if he had been kicked in the ribs – but he was out cold now.