In 1959, musicologist Alan Lomax recorded folk songs by inmates in Mississippi's prisons and work gangs. Four decades later, one of those songs, "Po' Lazarus," was selected for the "O Brother, Where Art Thou" soundtrack. When the album became a best-seller, its producers spent more than a year searching for the singer of "Po' Lazarus." They finally found him living in a rundown Chicago apartment. He had never heard of the movie and had forgotten Lomax's visit. They gave him a $20,000 check, the first of several royalty payments, and paid for his first plane trip, to L.A. for the 2002 Grammy Awards. The singer, James Carter, died last week at the age of 77. [Trib. login: gapers/gapers]