emacs output buffer coding system?

Question

Hi, I have in one of my directories an elisp file which I use to get a list of files:

((lambda ()
  (let ((coding-system-for-write 'utf-8-emacs)
    (get-these-files  '("FILE1" "FILE2")))
    (cmd "scp user@remotehost:pathtofiles/ .&"))
    (mapcar (lambda (x) (shell-command (format cmd x))) 
        get-these-files))))

[I use a lambda form with () around it to define the function and invoke it immediately so that I don't have to bind the function to a name. The & at the end of the command is to run the process asynchronously.]

For the printed output messages, I wonder what coding system I should specify (in place of utf-8-emacs) to get rid of the ^M and show the message I might expect from the terminal? (I haven't found too many useful references on these and would also appreciate any relevant links you might provide).

Thanks much, Stephen