A Christmas Memory Bettye Fitzpatrick and Charles Sanders star in Truman Capote's holiday classic. More subdued, more eccentric and, by many lights, more touching than Christmas on Walton's Mountain. A Christmas Memory is the Southern Gothic story of a young boy and his aunt and how they handle the holidays. A fine lunchtime treat, and sack lunches are encouraged. Have yourself a merry little afternoon break. Through December 24. Thursday, December 15, 1:30 p.m.; Friday, December 16, 12:15 and 1:30 p.m.; Saturday, December 17, 11 a.m.; Monday, December 19-Friday, December 23, 12:15 and 1:30 p.m.; and Saturday, December 24, 11 a.m. Christ Church Cathedral, Latham Auditorium, 1117 Texas (at San Jacinto). For tickets, call 227-2807. $7.