EXHIBIT 4.1

            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

   We consent to the reference to our firm under the caption "Experts-
Independent Registered Public Accounting Firm" and to the use of our report
dated May 1, 2008 in the Amendment No. 2 to the Registration Statement (File No.
333-149103) and related Prospectus of Claymore Securities Defined Portfolios,
Series 477.


                                                          /s/ Grant Thornton LLP
                                                         -----------------------
                                                              GRANT THORNTON LLP


Chicago, Illinois
May 1, 2008