Ed is getting the strongest suggestion that the 'argument' might be something a little more severe than Zsasz suggested. Ed was clear, he didn't want or need to know, especially since it was just them, but now he's aware of the schism.

He takes the money back, counting it out of the clip and putting it in his own wallet, which is comfortably full enough. The clip is tossed into a bin they walk past.

Ed, notably, is wearing leather gloves. They're a staple for him now. Just in case he has to stab more people.

"There's a switchblade in the right pocket. Just so you know." One of his few belongings from home. "Please don't use it on me. Whatever happened, will happen, in this place, those of us from our Gotham need to stick together. I promised Zsasz I'd look after him, since you weren't here to be his boss. I got him a good contract, comfortable place. He actually lives in the Barbie house as well, did you know, you can actually make a hand press for bullets from scrap metal and car parts? Uh-huh. It's surprisingly easy, and gunpowder can be manufactured if you need it and don't want anything traceable, I'm rambling, stupid Ed, he doesn't care about that."

At least it's still Ed talking.