The Old Norse-Icelandic Mar u saga survives in nineteen manuscripts. While the 1871 edition of the saga provides an edition of two versions based on multiple manuscripts and prints significant variants in the notes, the edition does not preserve the literary and social contexts of those manuscripts. In the extant manuscripts Mar u saga rarely exists in the codex by itself. The present study, then, restores the saga to its manuscript contexts in order to better understand the meaning of the text within its manuscript matrix, why it was copied in the specific manuscripts it was, and how it was read and used by the different communities who preserved the manuscripts.