sentences:  The Earl of Hertford provided his wife with a document that would, in the event of his death, enable her to prove the marriage and inherit his property, but apparently Katherine lost the document.Thus, after Lady Jane Seymour died of tuberculosis in 1561, Katherine was unable to prove that they had ever been married.Katherine, Lady Hertford, concealed the marriage from everyone for months, even after she became pregnant; in her eighth month of pregnancy and on progress with the royal court to Ipswich, she decided to ask someone to plead for her with the Queen.