I hope you do find him. But, letting them out unattended especially overnight makes them easy predetor to traffic, stray dogs, stray cats, someone to pick him up and take him in, be trapped or if you like in a Rual area like me, coyotes, foxes, racoons, ECT. It's really not good to let housecats out. I'll keep my fingers crossed. Does he have an ID tag? If he doesn't show up soon, I'd post papers with his photo and say:
Missing Cat "name here". Answers to "name here". I really would like to have my cat back because I love him so much. If you find him, please call me at "number here" and you can even include a reward if you want to. I just hope you find him. Keep us updated.
*Saying A Prayer That Domino Stays Safe & Warm*