Oracle Package body problem - major headache

I'm trying to create a package that will run dbms_job to kick off a nightly procedure.  NB This is Oracle 7.

The package compiles fine, but the package body just will not compile.  The procedure is compiled fine.

Package:
CREATE OR REPLACE
 PACKAGE <mypkg>
as procedure  
<mypkg>;
end;  

Package body:
CREATE OR REPLACE
 PACKAGE BODY <mypkg>
as PROCEDURE <myproc> IS
  jobno NUMBER;
begin
 dbms_job.submit (jobno,
                  'begin <myproc>; end;',
                   'sysdate+3/1440',
                  'TRUNC(sysdate+1)+3/24');
END;
/

The error I get with this version is:
Line 10 col 0
PLS-00103: Encountered the symbol ";" when expecting one of the following:
begin end function package pragma procedure form

If I replace END; with END PROCEDURE;
the error message changes to
Line 8 col 5
PLS-00103: Encountered the symbol "PROCEDURE" when expecting one of the following:
; <an identifier> <a double-quoted delimited-identifier>
<a single-quoted SQL string> delete existst prior

If I replace END; with END <myproc>;
the error message changes to
Line 9 col 0
PLS-00103: Encountered the symbol ";" when expecting one of the following:
begin end function package pragma procedure form

and if I replace END; with END PROCEDURE <myproc>;
the error goes back to the same as with just PROCEDURE.

WHAT am I doing wrong here???

NB have also re-run catproc.sql in case the problem was corruption of dbms_job and everything compiled fine.