[Pontus de THYARD]. Erreurs amoureuses, Augmentees d'une tierce partie. Plus Un livre de Vers Liriques. In-8, olive morocco, triple fillet, nicely decorated smooth spine, gilt edges (18th century binding). Barbier, II-171 // Brunet, V-853 // Cartier, Tournes, II-315 // Cioranescu, 21460 // Tchemerzine-Scheler, V-891. 169-(1 f.) / a-l8 (last 2 blanks) / 100 x 159 mm. Fourth edition, partly original, and first complete edition of Erreurs amoureuses. This collection of sonnets and poems addressed to a woman nicknamed l'Ombre de ma vie had a strong influence on the poets of his time, particularly Ronsard. First published in 1549 in Lyon by Jean de Tournes, the Erreurs amoureuses were followed by a sequel in 1551 under the title Continuation des erreurs amoureuses. Two further editions followed in 1553 and 1554, culminating in the 1555 edition, ours, the first complete one, augmented by a third part and a Book of Lied Verse. The title is adorned with a fine arabesque frame as a cul-de-lampe (Cartier, 93) and the verso of the title is illustrated with a portrait of the dedicatee surrounded by the motto De ma vie l'ombre. An early facsimile of one of Thyard's writings is bound in fine. A fine copy in 18th century olive green morocco. Spine faded, margins a little short at head, old handwritten annotations on endpaper. Provenance: Adolphe Audenet (ex-libris torn off) and Prosper Blanchemain (ex-libris).