This CD-ROM, with full color digital facsimiles and documentary texts of San Marino, Huntington Library MS HM 128 [Hm, Hm2 ], is the sixth volume of The Piers Plowman Electronic Archive, an international collaborative project devoted to electronic publication of all the medieval and renaissance witnesses to William Langland's Piers Plowman. Hm is a second-generation witness to the B version with extensive erasures [over 1500 instances] and heavily emended with over 700 additions to the original text in contemporary hands. Hyper-textual linkages enable display of the complex relationships of the base text to other B witnesses as well as delineating the individual contributions of the three scribes who wrote and changed this manuscript. There are colour facsimile images of every page in the manuscript, hyper-textually linked to the edited text which is itself presented in four different views: a diplomatic type-facsimile; a scribal text which includes iconic indications of scribal error; a critical text with lapsus calami corrected; and an All Tags view that shows all of the editorial interventions on one screen. Minimum system requirements: PCs: 486 or later; Windows95, 98, Me, NT, XP +. Internet Explorer, Version 6.0. Macintosh users require high-end equipment (System 9 or later) running Windows emulation software.