Among the many manuscripts held at Oxford is a large Greek codex containing works composed by Philo of Alexandria (c. 20 BC–c. 50 AD). One of the most interesting aspects of New College MS 143 is that it is a combination of two groups of Philo treatises that come from different manuscript families. Although the compilation of what came to be MS 143 is not known, it appears that this book is a secondary binding of two already-completed codices. 

New College Library, Oxford, MS 143, f. 3r

New College Library and Archives, Oxford