William Howard Knowles, 62, a longtime resident of Irving, Texas, a U.S. Marine Corps veteran of Vietnam, a successful residential real estate agent for the past 8 years, passed away on Monday, January 21, 2002, following a valiant fight against prostrate cancer. The family will receive friends on Thursday, January 24, 2002, 6-8 p.m., at Donnelly's Colonial Funeral Home, 606 West Airport Freeway, Irving. Memorial services are scheduled for Friday, January 25, 1 p.m., at Plymouth Park United Methodist Church, 1615 West Airport Freeway, Irving, officiated by the Rev. Scott Holcomb-McLain. Arrangements entrusted to Donnelly's Colonial Funeral Home, Irving, Texas.