Thinking about this a little more, I wonder if you'd need to give the "queenless" swarm a frame of brood to anchor them, keep them from abscounding. But then, if the swarm was without a queen, wouldn't they just go back to their original hive. I suppose for that to happen you'd have to remove the queen from the cluster where it originally lands. Could just capture the queenright swarm, remove queen cells from the swarming hive wait a few days, check swarming hive for new queen cells removing if they exist, and combine with queenright swarm. Or, capture swarms as they issue, then when it's all said and done, combine as needed/wanted. Just a few more thoughts. Ted