Date: Sat, 29 Oct 2005 22:39:55 -0700 (PDT)
   From: bear <xxxxxx@sonic.net>

   With (read) capable of executing arbitrary code via quote,
   etc. it is entirely possible for (read) to encounter an
   error.  I want to know whether an error returned from (read)
   is one that was written and read, or one that prevented
   correct reading from occurring.

Why does it not suffice for READ to return objects that were written
and to signal, not to return, conditions for a condition handler to
receive?