VANGUARD WELLESLEY INCOME FUND INVESTMENT ADVISORY AGREEMENT ADDENDUM EFFECTIVE JULY 1, 2006 This Addendum amends Section 4 of the Investment Advisory Agreement dated July 1, 2005, between Vanguard Wellesley Income Fund (the "Fund") and Wellington...Investment Advisory Agreement • November 27th, 2006 • Vanguard Wellesley Income Fund
