Lady Elizabeth: Gratitude Toward Philip

On the 17th of March 1554, Elizabeth was informed that she was to be taken to the Tower of London as a prisoner of the queen for her involvement in Wyatt’s Rebellion. When informed she requested a moment to write a letter to her sister, the queen. In it she asked not to be condemned without proof and protested her innocence. By the time she completed her letter the tide had changed and spared her one more night before being sent to the Tower.
One can imagine the thoughts going through Elizabeth’s head that night. Had she thought of her dear mother who never left the Tower, except for her execution?
Elizabeth spent two months at the Tower — two long months. Upon her release she was put under house arrest at the manor of Woodstock.

It is noted that Elizabeth wrote this letter to Philip after her release from the Tower. I assume that she wrote this from Woodstock but the letter is not noted a specific date or location.
I am unfamiliar with what Philip did to help her cause but believe he had persuasive powers over his love-struck wife, Queen Mary.
Letter written by Elizabeth to King Philip, 1554:
Sire, I have been fully informed, and am well persuaded of your generous exertions on my behalf, to liberate me from the wearisome woes of an imprisonment, so hard and so tedious, which I should have endured with more patience, if I had been accused of anything less hurtful to my feelings than that of having been wanting in fidelity to the queen my sister. Buy knowing myself as faithful and zealous in her service as I am, I cannot but feel my heart rent and torn, at the mere remembrance of a disgrace that could have made others believe me capable of even a sinister thought against the interests and glory of the queen, my lady. Yea, if my heart had been capable of being stained only by the shadow of such a thought, I would pluck it out with my own hands; and this perfect consciousness of my innocence has rendered my long and painful imprisonment insupportable. God grant, however, that I may never accuse any by myself of my misfortune, nor ever cause a shadow if reproach to the glory or the justice of the queen, my lady. I being fully persuaded that she was moved by my unlucky star to resolve on my imprisonment, her heart being so generous and so just, that she could not devise the thought of doing wrong to the least of her subjects, and still less, to her unfortunate sister, who never has had other thought than of showing her ad profound obedience as does the least of her servants.
I do not think that I shall offend the equity, clemency, and august goodness of the queen towards me, if I render very humble thanks to your majesty, in that you have had the goodness to espouse so generously the cause of my liberty. From a king so generous and so August can proceed nothing but favour; it is this which makes me taken liberty humbly to entreat you to continue to me your protection, and to be pleased ever to consider me
Your majesty’s very humble servant and subject,
Elizabeth
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Sources:
Letters of Royal and Illustrious Ladies of Great Britain, Vol. 3, page 293
Norton, Elizabeth – The Tudor Treasury; pages 107-108
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Elizabeth l History Mary l Queens Elizabeth Tudor Mary Tudor Philip of Spain Tower of London Wyatt's Rebellion
Philip was consistent in his support of Elizabeth as Mary’s heir, though she consistently refused his attempts to marry her to one of his dukes.
*But if she did know . . .
*without Elizabeth providing a written reply.
I agree with Memarge’s statement above that no actual proof was found regarding The Lady Elizabeth’s complicity in Wyatt’s Rebellion.Any letters she would have received would also have been burned with her providing a written replay.
But if she did now and wasn’t part of the conspiracy, then did she fail to warn the government of her paternal half-sister Queen Mary I?
I would add that, IMHO, Philip aided Elizabeth because. if his new wife Queen Mary I should die childless, Elizabeth was the next heir.
And if Roman Catholic Mary executed the Protestant Elizabeth like Her Majesty executed their mutual cousin, the radical Protestant Lady Jane Grey, “The Nine Days” Queen of England, the month before Elizabeth’s incarceration in the Tower (Lady Jane was executed in February 1554); then the next heir to England was the 12-year-old Scottish Queen—Mary Queen of Scots who, although a Roman Catholic—was also being reared at the French Court and betrothed to the Dauphin [pronounced: dough-fan] Francois, Mary Queen of Scots was the granddaughter of Margaret Tudor, Queen of Scots, paternal aunt through King Henry VIII of England of both Queen Mary I and The Lady Elizabeth.
Philip was favoring Elizabeth over Mary Queen of Scots because a Franco-Scottish alliance already would create a blockage in the English Channel for Spanish trade ships sailing to ports in the Spanish Netherlands.
Phillip asked Mary to spare Elizabeth. There was no actual proof found that Elizabeth had participated in any way in Wyatt’s Rebellion.