[Eustace had seen the posting, so it's no surprise that he would go out and try find those animals, even thinking about bringing them to the café if no one else takes them in. So he's actually a little relieved to see someone else there, and someone he recognizes even if it had been a while.
Seeing the kitten is asleep on his lap, he makes sure to make his approach quiet.]
sweet child o mine
Seeing the kitten is asleep on his lap, he makes sure to make his approach quiet.]
Looks like you'll have to be there for a while.
[Yes, he knows that plight very well...]