Asked further about sources for Not I, Beckett referred questioners back to his own novel, The Unnamable with its clamouring voice longing for silence, circular narrative and concern about avoiding the first person pronoun: “I shall not say I again, ever again”.
Mark Kinsey Stephenson is an American-born actor most famous for his role as Randolph Carter in the H.P. Lovecraft film adaptation named The Unnamable and its sequel The Unnamable II: The Statement of Randolph Carter; the latter covered the whole of Lovecraft's story, The Statement of Randolph Carter, in about ten minutes.