He was 18. I found him on the floor of my study on his side, with his paws in 'running' position. He always comes down to be fed in the morning, at noon, at night. He always used to wake me up in the morning. This morning his sister - and litter-mate: they have never been separated, since birth - meowed many times to wake my husband up. I went down and fed her. Miso didn't come. I felt a dread, went up, and found him. It is a sad, sad day. He was my constant companion. He always greeted me at the door whenever I'd return -- from wherever. He was always there.