It is now 9 days later that I am writing to say that my cry-baby older cat has finally adjusted to his new surrounding and his cat brothers & sisters, and has limited his crying to a few times now rather than all night. I know our other cats were just as surprised to his crying too since none of them ever did that when they were introduced into our home even from kittens. "Prince", the cry-baby and my new cream persian is no longer the "Royal Pain" now and we can all sleep peacefully now. Thanks for the information and maybe someone else can see what happens when a new cat is introduced into the home. 
