Trinity College, Dublin MS 1317 [H.2.15B] is an autograph manuscript by Dubhaltach Mac Fhirbhisigh (murdered 1671). The most succinct description of the manuscript is by Irish historian, William O'Sullivan: [It is] "the most personal of Dubhaltach's surviving manuscripts, including scribblings as well as texts written by himself and his grandfather, Dubhaltach Mor. Unhappily, because written on paper, hard wear has many items in a fragmentry conditions."