I am so very sorry to hear!!!
I was thrilled when I first read that you'd take in gentle Eduardo, as Edwina has been a spoiled only-cat for quite awhile (exactly like Nellie) and I knew it wouldn't be easy...
Nellie now knows the neighbor's cat for four years and he has quite the same personality like Eddie, never a hiss or a growl and so very gentle...but Nellie is growling so much at him I sometimes expect her to have a heartattack...but sometimes they even sit together...
Cats work out their relations on their own terms...and they often make up their minds...one day is sunshine, the other day is rain!!!
But you've done so very well and always kept up your wonderful humor and I admire you so much for taking in Eduardo that I hope and pray they will get along one day!!!
I very much enjoyed the book "Is your cat crazy" by John C.Wright...it's about Cat therapies and it's interesting and funny to read...
And to Edwina: I am sure pretty girl that you couldn't ask for a better guy to accompany you then sweet gentle Eduardo...give him a chance and make your Secretary (:) ) happy again!!!