Freestone County, Texas Obituaries [Porter Funeral Home] Alvis Clayton Mathison Alvis Clayton Mathison, 78, of Wortham, Passed away on April 19, 2011 at the Manor Healthcare residence in Mexia. Graveside services were held on Tuesday, April 19, 2011 at 5:00 p.m. at Wortham Cemetery with Bro. Gene Allen officiating. Mr. Mathison was born on August 20, 1932, in Freestone County, Texas, to Marion and Mae Magness Mathison. He is survived by his sons, Carl Mathison of Teague and Ira Mathison of Mexia; three grandchildren; one step-grandchild and one great-grandchild.