The aim of the editor, Walid ‘Arafat, 'to produce as complete a record as possible of the poetry ascribed to Hassān b. Thabit in the different recensions of the Dīwān and in other sources together with the scholia in the Dīwān, additional notes from other sources and editorial comments’, as stated in his preface (p. 1), has been pursued by him with praiseworthy perseverance, zeal, and dedication. Ten different manuscripts of the Dīwān have been closely examined and evaluated (introduction, pp. 10–23). The poems of the Dīwān have been accordingly divided in the following manner: poems 1–225 from the MS Ahmet III, 2534 (T) form the main part of the Dīwān; poems 226–63 from MS Ahmet III, 2584 (TA) form the second part of the Dīwān called al-Ziyādāt; the poems 264–372 are additions gathered from other sources (ziyādāt min ghayri makhtūtāt al-Dīwān). The ‘Introduction’ contains sections dealing with the life of Hassān (pp. 3–7), former editions of the Dīwān (pp. 7–10), recensions of the Dīwān and its MSS (pp. 10–23), and the authenticity of the poems (pp. 23–31). In his sharp criticism of the authenticity of a great many of the poems ascribed to Hassān, ‘Arafat often refers to his own articles, basing his conclusions on an analysis of the style and composition of these poems, the historical circumstances and developments, and the statements of early Muslim scholars.