Calvin's confidence has grown by leaps and bounds. He is still not comfortable enough to approach us, but once we scoop him up, he purrs immediately and loudly! He loves to be cuddled, kissed, and carried around, and he is very playful.
When he first arrived, he would just glare at us; now he looks around with big, curious eyes. We closed the door to our bedroom and brought him in so I could enjoy his company comfortably, and he confidently wandered around on the bed, eventually jumping down to explore the room. He's very curious, and I think he's probably a smart little kitty.
He will be up on petfinder soon, so if anyone is interested, let me know!