Jessica Denney & Earl Strupp in "Jacob Marley's Christmas Carol"After attending the New Ground Theatre's production of Jacob Marley's Christmas Carol, I wasn't much surprised to learn that Tom Mula's play has been broadcast on NPR numerous times now; a dramatization of Charles Dickens' Christmas Carol story through Marley's point-of-view, the show, with its blend of performance and frequent narration, seems tailor-made for radio. What I can't understand, though - at least based on New Ground's presentation - is what makes it a good fit for the stage.