Dating Ockeghem's works is controversial, as there are almost no external references allowing precise dating, excepting of course the death of Binchois (1460) for which Ockeghem composed a motet-chanson. The Missa Caput is almost certainly an early work, since it follows on an anonymous English mass of the same title dated to the 1440s, and his late masses may include the Missa Ma maistresse and Missa Fors seulement, in view of both his innovative treatment of the cantus firmus, and his tendency to write more and more homogeneous textures later in his life.[5]