Document Xr13BrrjnbNYzragM7KnGzvd

A. P. GREEN INDUSTRIES, INC. __ MEXICO. MISSOURI 65265 January 28, 1SS3 r Eoard of Directors . A. P. Green Services Inc. 1250 Maplelawn Drive Troy, Michigan 48007 Gentlemen: I hereby resign as Chairman of the Board and Director of A. P. Green Services Inc., a subsidiary of A. P. Green Industries, Inc. ("A. P. Green") effective as of the dis tribution by USG Corporation ("USG") of all of its capital stock in A. P. Green to the common stockholders of USG. Very truly yours. Chief Executive Officer Seeing Industry Since 1910