Main (Thompson) Library location: South wing -- First window. Thielman Kerver (c. 14-- – c. 1524/5) was born in Coblentz, Germany and moved to Paris to work as a bookseller at the Sign of the Unicorn. There, with printer Jean Philippe, he became interested in the publication of Books of Hours. In 1497, Kerver printed his first independent book, entitled Hore beate Marie Virginis secundum usum Sarum for the Church of Salisbury. In the next year, he entered a partnership with Georges Wolff, who supplied him with new typesets and illustrations, specifically borders and bas-de-page imagery. Accordingly, Kerver's work, with the influence of Wolff, became known for its visual qualities and inclusions of pictorial narrative. Kerver also printed for the presses of Jean Petit, Durand Gerlier, and Gillet Remachle. Among his most significant publications are Breviarum secundum usum sacri ordinis Cluniacensis,Officia quotidiana sive horas beate Marie, and a Latin Bible. The mark of Thielman Kerver in the Vassar Library combines the printer's monogram T.K. with the fusion of a four-mark and a cross. The two are divided by a horizontal bar, which, in the full device, formed part of a heraldic shield. This shield was ordinarily suspended from the branch of a slender oak tree, flanked by rearing unicorns – which represent Kerver's printing firm at the Sign of the Unicorn. Beneath this scene would have been a scroll bearing the printer's full name.