Mr. Bodling,

It is kind of you to step in and help the waif.  Thanks, on his
behalf, heh.  If your kitten is wild (known as feral) then he will be
difficult to tame, though many have done so successfully, it takes a
great deal of patience.  I can't answer all your questions about
letting it back out, in truth I don't know, but if he has lost his
family, you won't catch him a second time I can guarantee it.  Your
best bet is to call your local veterinarian in the yellow pages to ask
and find out as soon as possible.  There are locations with services
to help with feral animals in some counties.  If you can't find access
to anyone today on Sunday, try even your local pet store for advice,
and kitten's milk, they can at least get you through the first night.
Whichever, you will want someone's advice about feeding immediately if
he's as young as you suggested, and about assessing him health-wise
which could be important.  They can also assist you with finding a no-
kill shelter in case he becomes too much for you to handle.  Again,
thanks for taking him on, it sounds like you might have saved his
little life.

--tension.

ps...if you're up for it, how 'bout scouting around for the other
one?  You might just find out more about what the situation is.  You
could also put some food and water out the back door tonight as a
friendly signal, if you feel like saving a family entire.