0001193125-10-037618 Sample Contracts

The Hanover Insurance Group, Inc. $200,000,000 7.50% Notes Due 2020 Underwriting Agreement February 18, 2010

Underwriting Agreement • February 23rd, 2010 • Hanover Insurance Group, Inc. • Fire, marine & casualty insurance • New York

• Contract Type
  Underwriting Agreement
• Filed
  February 23rd, 2010
• Company
  Hanover Insurance Group, Inc.
• Industry
  Fire, marine & casualty insurance
• Jurisdiction
  New York

THE HANOVER INSURANCE GROUP, INC., as Issuer and U.S. Bank National Association, as Trustee FIRST SUPPLEMENTAL INDENTURE Dated as of February 23, 2010 to the Indenture dated as of January 21, 2010 7.50% Notes due 2020

Supplemental Indenture • February 23rd, 2010 • Hanover Insurance Group, Inc. • Fire, marine & casualty insurance • New York

• Contract Type
  Supplemental Indenture
• Filed
  February 23rd, 2010
• Company
  Hanover Insurance Group, Inc.
• Industry
  Fire, marine & casualty insurance
• Jurisdiction
  New York

FIRST SUPPLEMENTAL INDENTURE (this “First Supplemental Indenture”), dated as of February 23, 2010, between The Hanover Insurance Group, Inc., a Delaware corporation (the “Company”), and U.S. Bank National Association, as Trustee (the “Trustee”).