EXHIBIT 4.1


                        Advisors Asset Management, Inc.
                              18925 Base Camp Road
                           Monument, Colorado  80132


                                January 17, 2018




Advisors Disciplined Trust 1856
c/o The Bank of New York Mellon, as Trustee
BNY Atlantic Terminal
2 Hanson Place, 12th Floor
Brooklyn, New York 11217

     Re:          Advisors Disciplined Trust 1856 (the "Fund")


Ladies and Gentlemen:

     We have examined the Registration Statement File No. 333-221905 for the
above captioned Fund.  We hereby consent to the use in the Registration
Statement of the references to Advisors Asset Management, Inc. as evaluator.

     You are hereby authorized to file a copy of this letter with the Securities
and Exchange Commission.

                             Very truly yours,

                             Advisors Asset Management, Inc.


                             By     /s/ ALEX R. MEITZNER
                               ------------------------------
                                   Senior Vice President