I found a picture of what is said to be a lock of Mary Tudor Brandon’s hair in the Moyses’ Hall Museum in Bury St. Edmond, Suffolk. Have you ever seen it or know of it? Is there evidence to prove it is actually a lock of her hair. If you like I can send you the photograph via email. Just let me know!
I haven't ever seen of it but I have heard of its existence. It was apparently cut from Mary's head when her tomb was opened in the 18th century. See http://queryblog.tudorhistory.org/2009/03/question-from-kathy-description-of-mary.html for PhD Historian's comment, which includes an extract from a manuscipt describing the disinterment and the cutting of the lock of hair, and http://www.dailymail.co.uk/sciencetech/article-440194/The-hair-unlock-riddle-Princes-Tower.html which is an interesting newspaper article.