You and Clyde are in my prayers. Does he recognize the sound of your car? I found an escaped cat that way - driving slowly through the neighborhood and calling him. Since he's an inside cat he may be in the neighborhood but not sure exactly how to get home. Also, it may be easier to find him at night, since that's when cats are more active. I'm assuming it's getting cold in Novia Scotia by now - is there a warm spot he may be snoozing in during the day, like someone's garage or toolshed or something? I know you're out of your head with fear and worry. You and Clyde (and Scooter) are in our thoughts and prayers!