After moving and dividing some hives several months ago, I finally got around to checking through the brood chambers and found a number of Drone laying hives. To two hives I added nucs with queens directly into the hives with lots of smoke. One nuc was 2 frames and the other 3, and after 35 days both hives were fine and I saw both queens. To three hives I added one frame of brood with a queen cell and after 35 days two had nice young queens with sealed brood. The other had no queen or brood and isn't worth trying to save. Regards to the list Tim Vaughan