The two cats remaining are now in the process of taking back the house. Albert is 15, little, white, and entirely too chubby, but quite sanguine about the newly expanded living area. He is slowly reacquainting himself with the chairs, the warm place in front of the stove, the front storm door, where he can sit in the sun and look out over the fields--Isabel is pretty tightly wrapped, less trustful, even after 10 years of living here, and while she uses the cat door she prefers to be let out, and has to be reminded that she's got her house back, too.
And even now both the humans still reach for the screen door that separated the two floors, and that too will take time to adjust to. Having a cat or dog arrive, or leave, in whatever shape, changes the entire fabric of the household.
Once these guys get used to the new spaces I'll be heading out for the local humane society and see what I can find for playmates for them. I looked over the website for Cocheco Valley Humane Society, and came away wanting all the middle aged lady cats and their life long buddies. All of them.