The earliest Naru texts do not present a finished human alphabet. They preserve recurrent geometric signs. During the first decades of consultation, Questioners assigned provisional sound values, compared recurring sequences with Naduma speech, and regularized a set of twenty-one phonemic signs. The resulting writing system was then used to write Naduma language outside the original response context.nnResearchers therefore distinguish between Naru original signs, Questioner standard forms, and later vernacular forms. These are developmental stages of one tradition, not three independent scripts. Two additional non-phonemic signs conventionally called FORMLESS and FORBIDDEN occur in consultation contexts. Silence is represented only by the absence of a return.nn