They are barred but look very similar as adults. Not the usual barring.The Deathlayers looked barred when I was reading about them, I bet the lighter one is a boy. I will scan the pages from this old book. "Modern Poultry Husbandry" by Leonard Robinson. Got it on Amazon, interesting reading from post WW2 England. Published in 1953.
I can open that document but I don't have a printer....