Exhibit 5.2

                  [Richards, Layton & Finger, P.A. Letterhead]

                               September 30, 2004

KeySpan Trust I
KeySpan Trust II
KeySpan Trust III
c/o KeySpan Corporation
One MetroTech Center
Brooklyn, New York 11201

            Re: KeySpan Trust I, KeySpan Trust II and KeySpan Trust III

Ladies and Gentlemen:

            We have acted as special Delaware counsel for KeySpan Trust I, a
Delaware statutory trust ("Trust I"), KeySpan Trust II, a Delaware statutory
trust ("Trust II") and KeySpan Trust III, a Delaware statutory trust ("Trust
III") (Trust I, Trust II and Trust III are hereinafter collectively referred to
as the "Trusts" and sometimes hereinafter individually referred to as a
"Trust"), in connection with the matters set forth herein. At your request, this
opinion is being furnished to you.

            We have examined and relied upon such records, documents,
certificates and other instruments as in our judgment are necessary or
appropriate to enable us to render the opinions expressed below, including the
following documents:

            (a)   The Certificate of Trust of Trust I, as filed with the office
                  of the Secretary of State of the State of Delaware (the
                  "Secretary of State") on May 3, 2001;

            (b)   The Certificate of Trust of Trust II, as filed with the
                  Secretary of State on May 3, 2001;

            (c)   The Certificate of Trust of Trust III, as filed with the
                  Secretary of State on May 3, 2001;

            (d)   The Declaration of Trust of Trust I, dated as of May 3, 2001,
                  among KeySpan Corporation, a New York corporation (the
                  "Company"), and the trustees named therein;



KeySpan Trust I, KeySpan Trust II
and KeySpan Trust III
September 30, 2004
Page 2

            (e)   The Declaration of Trust of Trust II, dated as of May 3, 2001,
                  among the Company and the trustees named therein;

            (f)   The Declaration of Trust of Trust III, dated as of May 3,
                  2001, among the Company and the trustees named therein;

            (g)   The Registration Statement (the "Registration Statement") on
                  Form S-3, including a preliminary prospectus (the
                  "Prospectus"), relating to, among other things, the Trust
                  Preferred Securities of the Trusts representing preferred
                  undivided beneficial interests in the assets of the Trusts
                  (each, a "Preferred Security" and collectively, the "Preferred
                  Securities"), to be filed by the Company and the Trusts with
                  the Securities and Exchange Commission on or about September
                  30, 2004;

            (h)   A form of Amended and Restated Declaration of Trust for each
                  of the Trusts, to be entered into between the Company, the
                  trustees of the Trust named therein, and the holders, from
                  time to time, of the undivided beneficial interests in the
                  assets of such Trust (collectively, the "Declarations of
                  Trust" and individually, a "Declaration of Trust"), attached
                  as an exhibit to the Registration Statement; and

            (i)   A Certificate of Good Standing for each of the Trusts, dated
                  September 30, 2004, obtained from the Secretary of State.

            Initially capitalized terms used herein and not otherwise defined
are used as defined in the Declarations of Trust.

            As to various questions of fact material to our opinion, we have
relied upon the representations made in the foregoing documents and upon
certificates of officers of the Company. With respect to all documents examined
by us, we have assumed (i) the authenticity of all documents submitted to us as
authentic originals, (ii) the conformity with the originals of all documents
submitted to us as copies or forms, and (iii) the genuineness of all signatures.

            For purposes of this opinion, we have assumed (i) that the
Declarations of Trust and the Certificates of Trust will be in full force and
effect and will not be amended, (ii) except to the extent provided in paragraph
1 below, the due organization or due formation, as the case may be, and valid
existence in good standing of each party to the documents examined by us under
the laws of the jurisdiction governing its organization or formation, (iii) the
legal capacity of natural persons who are parties to the documents examined by
us, (iv) that each of the parties to the documents examined by us has the power
and authority to execute and deliver, and to perform its obligations under, such
documents, (v) the due authorization, execution and delivery by all parties
thereto of all documents examined by us, (vi) the receipt by each Person to whom
a Preferred Security is to be issued by the Trusts (collectively, the "Preferred
Security Holders")



KeySpan Trust I, KeySpan Trust II
and KeySpan Trust III
September 30, 2004
Page 3

of a Preferred Security Certificate for such Preferred Security and the payment
for such Preferred Security, in accordance with the Declarations of Trust and
the Registration Statement, and (vii) that the Preferred Securities are
authenticated, issued and sold to the Security Holders in accordance with the
Declarations of Trust and the Registration Statement. We have not participated
in the preparation of the Registration Statement (except for providing this
opinion) or the Prospectus and assume no responsibility for their contents,
other than this opinion.

            This opinion is limited to the laws of the State of Delaware
(excluding the securities laws of the State of Delaware), and we have not
considered and express no opinion on the laws of any other jurisdiction,
including federal laws and rules and regulations relating thereto. Our opinions
are rendered only with respect to Delaware laws and rules, regulations and
orders thereunder which are currently in effect.

            Based upon the foregoing, and upon our examination of such questions
of law and statutes of the State of Delaware as we have considered necessary or
appropriate, and subject to the assumptions, qualifications, limitations and
exceptions set forth herein, we are of the opinion that:

                        1.    Each of the Trusts has been duly created and is
            validly existing in good standing as a statutory trust under the
            Statutory Trust Act.

                        2.    The Preferred Securities of each Trust will
            represent valid and, subject to the qualifications set forth in
            paragraph 3 below, legally issued, fully paid and nonassessable
            undivided beneficial interests in the assets of the applicable
            Trust.

                        3.    The Preferred Security Holders, as beneficial
            owners of the applicable Trust, will be entitled to the same
            limitation of personal liability extended to stockholders of private
            corporations for profit organized under the General Corporation Law
            of the State of Delaware. We note that the Preferred Security
            Holders may be obligated to make payments as set forth in the
            Declarations of Trust.

            We consent to the filing of this opinion with the Securities and
Exchange Commission as an exhibit to the Registration Statement. We hereby
consent to the use of our name under the heading "Legal Opinions" in the
Prospectus. In giving the foregoing consents, we do not thereby admit that we
come within the category of persons whose consent is required under Section 7 of
the Securities Act of 1933, as amended, or the rules and regulations of the
Securities and Exchange Commission thereunder.

                                Very truly yours,



                                /s/ RICHARDS, LAYTON & FINGER, P.A.