Storytelling has been an oral tradition in American Sign Language (ASL). Poetry was once thought to be central to speech and its written form until the 1970s. Just after linguistics in ASL emerged in the 1960s, poetry in sign language grew in scholarly studies since the 1970s
Signing the Body Poetic: Essays on American Sign Language Literature (2006) by Dirksen Bauman (Editor), Heidi Rose (Editor), Jennifer Nelson (Editor), William Stokoe (Foreword), W.J.T. Mitchell (Preface).
Valli, Clayton. Poetics of American Sign Language Poetry. Doctoral dissertation, The Union Institute Graduate School. June 1993.