Turin, Biblioteca Nazionale MS E. v. 9 (749), contains sermons for Lent by Jacobo da Voragine (fols. 1-168v old foliation, 1-167v new foliation), and, at the end of the codex, on fols. 169-75 (168-74, new foliation), a work which is headed 4 Incipit tractatus magistri Petri Abaielardi de sacramento altaris quod sit essentialiter ipsa Veritas carnis Christi et sanguinis et contra.’ The Tractatus, hereafter referred to as S, was identified by the late Nikolaus Haring as being question 117 of Abelard's Sic et Non, but was not known to Blanche Boyer and Richard McKeon when they were working on their definitive edition of the Sic et Non. S belongs to the versio prima of the Sic et Non, the ZTCEB group of manuscripts; within this group, Z is the very earliest surviving version, while TCEB, and with them S, form in effect a separate recension from Z. Before examining S's relation with TCEB it would be best to look at it on its own.