It was in his organ loft at Arnstadt that I began my acquaintance with Johann Sebastian Bach — with JSB, with the young man, with the writer, the fighter, the lover. After the great walk of his in 1705 that we would follow, and after his return trek in February 1706, he would be caught at it in that organ loft with a ‘mysterious’ woman, who may or may not have been she who became his wife.