Petrohawk Energy 8-K Triggering Events That Accelerate or Increase a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement

Exhibit 16.1

Deloitte & Touche LLP

Suite 4500

1111 Bagby Street

Houston, TX 77002-2591

USA

Tel: +1 713 982 2000

Fax: +1 713 982 2001

www.deloitte.com

August 24, 2011

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549-7561

Dear Sirs/Madams:

We have read Item 4 of Petrohawk Energy Corporation’s Form 8-K dated August 24, 2011, and we agree with the statements made therein.

Yours truly,

/s/ Deloitte & Touche LLP

Member of

Deloitte Touche Tohmatsu