Share 'Disappearing queens and absconding bees'

both if my top-bar hives came through the winter with very good numbers... then one swarmed three times before I could remove the swarm cells. The remaining bees absconded 4 days later. The other looked really good last week with a queen and brood, but when I looked today all the brood is hatched and there are no eggs or queen. So now I need a new queen and no one seems to have any. Does anyone k…