Exhibit 24.8

                                POWER OF ATTORNEY

STATE OF ARIZONA
COUNTY OF MARICOPA

     KNOW ALL MEN BY THESE PRESENTS that Stephen O. Evans, having an address
at 5825 E. Starlight Way, Paradise Valley, AZ 85253 has made, constituted and
appointed and BY THESE PRESENTS, does make, constitute and appoint Douglas
Crocker II and Michael J. McHugh, or either of them, having an address at Two
North Riverside Plaza, Chicago, Illinois 60606, his true and lawful
Attorney-in-Fact for him and his name, place and stead to sign and execute in
any and all capacities this Annual Report on Form 10-K and any or all
amendments to this Annual Report granting unto each of such,
Attorney-in-Fact, full power and authority to do and perform each and every
act and thing, requisite and necessary to be done in and about the premises,
as fully, to all intents and purposes as he might or could do if personally
present at the doing thereof, with full power of substitution and
revocation, hereby ratifying and confirming all that each of such
Attorney-in-Fact or his substitutes shall lawfully do or cause to be done by
virture hereof.

     This Power of Attorney shall remain in full force and effect until
terminated by the undersigned through the instrumentality of a signed
writing.

     IN WITNESS WHEREOF, Stephen O. Evans, has hereunto set his hand this
2nd day of March, 2000.

                                        /s/ Stephen O. Evans
                                        -----------------------
                                            Stephen O. Evans

     I, Kristine M. Kovac, a Notary Public in and for said County in the
State of aforesaid, do hereby certify that Stephen O. Evans, personally
known to me to be the same person whose name is subscribed to the foregoing
instrument appeared before me this day in person and acknowledged that he
signed and delivered said instrument as his own free voluntary act for the
uses and purposes therein set forth.

     Given under my hand and notarial seal this 2nd day of March, 2000.

                                           /s/ Kristine M. Kovac
                                          -----------------------
                                              (Notary Public)


My Commission Expires: November 23, 2003
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