Catty1, you should send him those links to his email so he can look at them. They might really change his mind.
Also, about the cats being in the crib......don't let the cats in the nursery, maybe . I know that might be easier said than done, but it was just an idea. Once the cats get used to the child being around they will not be as curious about it. They just need to be cautious and careful at first.
My brother had a cat when his first daughter was born and Bruce's brother has 3 cats who were around when his nephew was born.
I hope he can work it out so he can keep these two beautiful kitties.