COGNOVIT PROMISSORY NOTE OF JOHN D. OIL AND GAS COMPANY

Exhibit 10.1

COGNOVIT PROMISSORY NOTE OF

JOHN D. OIL AND GAS COMPANY

For value received, the undersigned, promises to pay to the order of Great Plains Exploration, LLC the principal sum of six hundred thousand   dollars ($600,000.00) with interest payable at the rate of 8.0% per month.  Principal is payable in the amount of one hundred thousand dollars ($100,000.00 ) per month plus accrued but unpaid interest on the twenty-eighth date of each month beginning on March 28, 2009.

The indebtedness evidenced hereby may be prepaid in whole or in part at any time without penalty or notice.

Notwithstanding anything to the contrary which may be provided for, or implied by, the other terms of this Note, the entire principal balance, together with all accrued and unpaid interest and any other charges, advances and fees, if any, outstanding hereunder, shall be due and payable in full on demand if the maker is more than thirty (30) days in arrears under this Note.

The Maker waives demand presentment for payment, prote