Delaware Capital Management, Inc.
One Commerce Square
Philadelphia, Pennsylvania 19103
August 6, 1998
Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C. 20549-1004
Attn: Filing Desk, Stop 1-4
Re: Delaware Investments Unit Investment Trust, Series 21 (the "Trust")
Ladies/Gentlemen:
Pursuant to the requirements of Rule 497(j) of the General Rules and
Regulations of the Securities Act of 1933, as amended, the form of prospectus
which would have been filed pursuant to Rule 497(b) of the General Rules and
Regulations of the Securities Act of 1933, as amended, would not have differed
from that contained in Amendment No. 1 to the Registration Statement for the
above referenced Trust, the most recent amendment, filed electronically with the
Securities and Exchange Commission of August 4, 1998.
Very truly yours,
Delaware Capital Management, Inc.
By: Michael D. Mabry
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Assistant Vice President/Assistant
Secretary/Senior Counsel
