Your best bet to convert this guy to indoor-only is now, when his life has
undergone such a drastic change.  Be strong, consult your vet about using
the Feliway products or even kitty prozac to help him through it (along
with lots of love), and consider ear plugs to help you through it.

Best of luck to you.

Sharon Talbert
Friends of Campus Cats
www.campuscats.org

Has he been neutered?  If not, do so.  Then be determined.   It may
take a while, but it can be done.  Good luck.  MLB

Give him some time. He's lost his person and been taken from his home to a
strange house. He's upset and grieving.
Give him lots of attention and do take him to the vet to see if they have any
suggestions.

laurak@madmousergraphics.com
http://www.madmousergraphics.com
web design, print design, photography

I adopted a feral a few years ago who did the same -- after a few weeks she
finally calmed down, and now loves being an indoor cat.  A couple of nights I
had to get up and sit with her so that my husband could sleep (he has to be at
work early in the a.m., whereas I set my own hours).  Eventually he will get
used to it -- I would say not to put him in the basement, though, as that may
reinforce the behaviour.  If you can, get up and give him some attention when
he's howling -- if not, I'm afraid you'll have to wait him out.  At least,
that's how it worked for me.  Good luck, let us know how it works out. -- M9