Nicor Gas Company Form 10-K Exhibit 1.01 NORTHERN ILLINOIS GAS COMPANY FIRST MORTGAGE BONDS 6.58% SERIES DUE FEBRUARY 15, 2028 UNDERWRITING AGREEMENT Salomon Brothers Inc 7 World Trade Center New York, New York 10048Underwriting Agreement • March 26th, 1998 • Northern Illinois Gas Co /Il/ /New/ • Natural gas transmission • Illinois
