If it's the song I think it is, and I haven't heard him sing it in years, or maybe decades, it's about Ramblin' Jack visiting his pal Billy Faier at Faier's house in New Orleans, which was on Toulouse St. But the title was, or is, 912 Greens; if it was 912 Toulouse St., that would be somewhere around Burgundy or Rampart and Toulouse, right?