A Treatise the Astrolabe by Geoffrey Chaucer is the work of an avid amateur astronomer who happened also to be England’s greatest medieval poet. A user of the astrolabe can plot the movement of the stars, tell time, and calculate numerous other results. Chaucer translated and revised a standard Latin treatment of the astrolabe. His treatise, which is generally regarded as one of the first technical manuals in English and a model of how technical manuals should be written. Not since 1872 has a free-standing edition of A Treatise the Astrolabe been published. Thanks to the expertise of its editor, Sigmund Eisner, who supplies sixty-eight illustrations, this Variorum edition provides a more detailed exposition than previously available. Eisner’s extensive labors result in the first complete record of textual variants found in the thirty-two surviving manuscripts of the work and in all the major printed text published between 1532 and 1987. This landmark edition also presents a thorough digest of all published commentary on Chaucer’s treatise. Amplified by sixty-eight illustrations, this variorum edition of Chaucer’s A Treatise on the Astrolabe provides a more detailed exposition of the treatise than has ever before been available.

The Romaunt of the Rose translates in abridged form a long dream vision, part elegant romance, part rollicking satire, written in France during the thirteenth century. The French original, Le Roman de la Rose, had a profound influence on Chaucer, who says he translated the work. From the sixteenth century to the mid-nineteenth, scholars assumed that the Romaunt comprised large fragments of that translation. Subsequent debates have divided the Romaunt into two or three segments, and proffered arguments that Chaucer was responsible for one or more of them, or for none. The current consensus is that he almost certainly wrote the first 1,705 lines. Charles Dahlberg’s edition of the Romaunt provides a full summary of scholarship on the question of authorship as well as other important topics, including a useful survey of the influence of the French poem on Chaucer.

The poems in this volume were prized and preserved because of their association with Chaucer's name and have been, paradoxically, almost entirely ignored by modern readers for the same reason. Many of these pieces are worthy of study, not only in the context of Chaucerian reception, but also as specimens of the kinds of vernacular poetry that circulated in late medieval manuscripts and which remained in print, largely by the accidental virtue of their association with Chaucer, throughout the Renaissance and well into the nineteenth century. The various genres represented in this sampler (the dream vision, good counsel, female panegyric, mass parody, proverbial wisdom, lover's dialogue, prochecy, advice to princes, elegiac complaint, courtly parody, and anti-feminist satire) attest to the diversity of late medieval literary tastes and to the flexibility of the courtly idiom. In the sixteenth century both Chaucer's poetry and the diverse works with which it circulated appear to have continued to have been valued for their perceived courtly qualities. Chaucer's early scribal and print editors also appear to have prized his sphere of influence (attested to by imitation, continuation, and emendation) and his adaptability to contemporary social and political needs.

The Chaucer Bibliography series aims to provide annotated bibliographies for all of Chaucer's work. This book summarizes 20th-century commentaries on Chaucer's "Pardoner's Prologue" and "Tale."

The Cambridge Companion to Chaucer is an extensively revised version of the first edition, which has become a classic in the field. This new volume responds to the success of the first edition and to recent debates in Chaucer Studies. Important material has been updated, and new contributions have been commissioned to take into account recent trends in literary theory as well as in studies of Chaucer's works. New chapters cover the literary inheritance traceable in his works to French and Italian sources, his style, as well as new approaches to his work. Other topics covered include the social and literary scene in England in Chaucer's time, and comedy, pathos and romance in the Canterbury Tales. The volume now offers a useful chronology, and the bibliography has been entirely updated to provide an indispensable guide for today's student of Chaucer.

On several counts, one particular collection of French lyrics made in France in the late fourteenth century, University of Pennsylvania MS 15, is the most likely repository of Chaucer's French poems. It is the largest manuscript anthology extant of fourteenth-century French lyrics in the formes fixes (balade, rondeaux, virelay, lay, and five-stanza chanson) with by far the largest number of works of unknown authorship. The known authors represented in the manuscript and the texts themselves have notable associations with England and with Chaucer. And intriguingly there are fifteen lyrics each headed by the initials Ch, very likely indications of authorship, neatly inserted between rubric and text. . . . [The] rubrics, together with other substantial manuscript evidence and the intrinsic worth of the poems, make them easily the best candidates among extant French lyrics for Chaucer's authorship, appropriate representatives of his French work. - from the Introduction