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Exhibit 16
Office of the Chief Accountant
SECPS Letter File
Securities and Exchange Commission
Mail Stop 11-3
450 Fifth Street, N.W.
Washington, D.C. 20549
November 29, 2000
Dear Sir or Madam:
We have read the paragraphs under Item 4 included in the Form
8-K dated November 29, 2000 of Commonwealth Edison Company to be filed
with the Securities and Exchange Commission and are in
agreement with the statements contained therein in response to
Item 304(a) of Regulation S-K.
Very truly yours,
Arthur Andersen LLP
Copy to: Ms. Ruth Ann Gillis
Chief Financial Officer Exelon
