Deltic Timber (DEL) 10-Q 2002 Q2 Quarterly report

Exhibit 99.2

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE

SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Deltic Timber Corporation (the “Company”) on Form 10-Q for the period ending June 30, 2002, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Clefton D. Vaughan, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1)    The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)    The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/    Clefton D. Vaughan

Clefton D. Vaughan

Chief Financial Officer

August 13, 2002