Codex Arundel, (British Library, Arundel, 263) is a bound collection of pages of notes written by Leonardo da Vinci and dating mostly from between 1480 and 1518. The codex contains a number of treatises on a variety of subjects, including mechanics and geometry. The name of the codex came from the Earl of Arundel, who acquired it in Spain in the 1630s. It forms part of the British Library Arundel Manuscripts. Source: Wikipedia (en)