Taking the time of writing as the object of observation, we are entitled to wonder about the reality of temporal data in writing. This chapter attempts to provide some answers by taking as a prerequisite the distinction proposed by Lebrave (2008; 1998) between visible data and legible data; the former con- cerns data that can, in Lebrave’s words, “only be the object of a descriptive commentary, an analysis or an interpretation”, while the latter makes it possible to “make traces speak [...] by transforming them into a discourse in which [we] are the enunciator” (1998) [our translations]. In other words, legibility is concerned with description, classification or inventory, while visibility is concerned with interpretation, which in this work is called transcription and representation. Visibility concerns the manuscript, the readability of the draft.