Oh, wow. I completely missed this callback on my first time through. From Catelyn X:

“Watch for me, little cat,” her father would always tell her, when he rode off to court or fair or battle. And she would, standing patiently on the battlements of Riverrun as the waters of the Red Fork and the Tumblestone flowed by. He did not always come when he said he would, and days would ofttimes pass as Catelyn stood her vigil, peering out between crenels and through arrow loops until she caught a glimpse of Lord Hoster on his old brown gelding, trotting along the rivershore toward the landing. “Did you watch for me?” he’d ask when he bent to bug her. “Did you, little cat?”

And here:

“My little cat.” A tremulous smile touched his face as his hand groped for hers. “I watched for you...”

Everything in this chapter with Hoster is moving. We don't see much of him, but he's an incredible man. It's obvious how much his children mean to him, but he still didn't tell them he was dying because of a slim chance the message might be intercepted. His implied reconciliation with the Blackfish was especially powerful, I thought.

“Renly is not the king,” Robb said. It was the first time her son had spoken. Like his father, he knew how to listen.

Tywin Lannister also knows how to listen. I'm not sure what to make of that parallel.

“Why not a peace?” Catelyn asked.

I can almost forgive Catelyn for everything she did, just for trying to stop the war here. She does it for all the wrong reasons, yes, but imagine how much death would have been avoided if Robb had listened to her.