<PAGE>
EXHIBIT 23.10
LEGG MASON WOOD WALKER, INCORPORATED
CONSENT
We hereby consent to (i) the inclusion of our opinion letter, dated
October 4, 1999 to the Board of Directors of Fall River Gas Company ("Fall
River Gas") as Appendix B to the Proxy Statement/Prospectus of Fall River Gas
and Southern Union Company ("Southern Union") relating to the proposed merger
between Southern Union and Fall River Gas and (ii) all references to Legg
Mason in the sections captioned "The Merger -- Fall River Gas Background of
the Merger" and "The Merger-Opinion of Fall River Gas' Financial Advisor" of
the Proxy Statement/Prospectus which form a part of this Registration
Statement on Form S-4. In giving such consent, we do not admit that we come
within the category of persons whose consent is required under Section 7, of,
and we do not admit that we are "experts" for purposes of, the Securities Act
of 1933, as amended, and the rules and regulations promulgated thereunder.
ALEXSANDER M. STEWART, Managing Director
Legg Mason Wood Walker, Incorporated
Baltimore, Maryland
June 30, 2000
