@ the OP
There is always a person somewhere worrying about a lost cat.
It’s quiet in the house tonight, we are all quiet.
She doesn’t know where her brother is.
I watch her checking around the garden, all the usual spots,where he would pounce and chase her down the path, but no ,not anymore, no ambush . We can’t tell her that he didn’t make that dash across the road, so he won’t be around to annoy her,but when she comes in I talk to her anyway, and tell her about the incredibly nice human that saw her brother get hit by the car, that took the time to stop and try to help , then drove him to a vet and waited with him till the end. She never left her name, but from the bottom of my heart ,thank you so much for that selfless act ,of caring for someone else’s pet and letting us know .He was the best of cats.