The manuscript appears to have been retained by Hopcyn’s family until the end of the 15th century, when Hopcyn’s grandson Hopcyn ap Rhys was held complicit in the rebellion against King Edward IV and consequently saw much of his property forfeited.
Semella que o manuscrito permaneceu nas mans da familia de Hopcyn ata finais do século XV, cando o neto de Hopcyn, Hopcyn ap Rhys, foi considerado cómplice da rebelión contra o rei Eduardo IV e consecuentemente perdeu gran parte das súas propiedades.