Midnight meowing? what does it mean?!?

Cats prowl at night, through back to their ancestors when the big cats prefer to hunt. The first night, it's no wonder she cried all night, she was scared, new home, new servants, it takes time for them to settle in. You also think she may be of the breed of Bombay, one of the "talkative" breeds. It never hurts to "comfort" a new cat or one you may have had for many years. I hope this is of some help to you.