1 EXHIBIT 4.20 ================================================================ ================ SUPPLEMENTAL INDENTURE ------------------------ DATED ------------------------ NORTHERN ILLINOIS GAS COMPANY TO HARRIS TRUST AND SAVINGS BANK TRUSTEE...Supplemental Indenture • December 18th, 1997 • Northern Illinois Gas Co /Il/ /New/ • Natural gas transmission
1 EXHIBIT 1.01 NORTHERN ILLINOIS GAS COMPANY $ ,000,000 FIRST MORTGAGE BONDS % SERIES DUE UNDERWRITING AGREEMENT [NAME(S) OF REPRESENTATIVES] As Representative(s) of the several Underwriters , 199 Dear Sirs: Northern Illinois Gas Company, doing...Underwriting Agreement • December 18th, 1997 • Northern Illinois Gas Co /Il/ /New/ • Natural gas transmission • Illinois
