Donna, when you come home from work, take a nap for an hour, you must be exhausted. And then take another round looking for Eli at dusk or when it's quiet out there. Perhaps it would help if you could put a leash and harness on one of your other cats to take along. Both Eli and your other cat may recognize each other. You don't have a dog who could search, do you?

I so hope you'll find Eli safe and sound! Fingers and paws still crossed here.