Re: After catching a swarm
Putting a frame of brood comb was a good move. I either close screened bottom boards if I use them to hive a swarm or use a solid bottom board (the preferred method for me). Swarms like a dark area when they move in and are less likely to abscond in my experience. You can try putting a queen excluder under the box but be aware that drones will get caught in it and remove it after three days or so. By three days they should have built some comb and a mated queen should have started laying eggs, all of which should anchor the swarm. You also want a virgin to be able to take mating flights, if the swarm was an after swarm with a virgin.
"Sometimes the best action, with bees, is no action at all."