EXHIBIT A

                           AGREEMENT OF JOINT FILING

            In accordance with Rule 13d-1(k) under the Securities Exchange Act
of 1934, as amended, the undersigned hereby agree to the joint filing with all
other persons signatory below of a statement on Schedule 13G or any amendments
thereto, with respect to the Common Stock of drugstore.com, inc., and that this
Agreement be included as an exhibit to such filing.

         This Agreement may be executed in any number of counterparts each of
which shall be deemed to be an original and all of which together shall be
deemed to constitute one and the same Agreement.

         IN WITNESS WHEREOF, the undersigned hereby execute this Agreement on
December 18, 2003.



                                              /s/ Ian Mummery
                                              --------------------------------
                                              Ian Mummery, Individually


                                              /s/ Louise Mummery
                                              --------------------------------
                                              Louise Mummery, Individually