chunk: With the death of Glyde, the trio are safe from persecution, but still have no way of proving Laura's true identity. Walter suspects that Anne died before Laura's trip to London, and proof of this would prove their story; but only Fosco holds knowledge of the dates. Walter figures out from a letter he got from Mrs. Catherick's former employer, that Anne was the illegitimate child of Laura's father. On a visit to the Opera with Pesca, he learns that Fosco has betrayed an Italian nationalist society, of which Pesca is a high-ranking member. When Fosco prepares to flee the country, Walter forces a written confession from him, by which Laura's identity is legally restored, in exchange for safe-conduct from England. Laura's identity is restored and the inscription on her gravestone replaced by that of Anne Catherick. Fosco escapes, only to be killed by another agent of the society. To ensure the legitimacy of his efforts on her part, Walter and Laura have married earlier; and on the death