Full View of Margaret Tudor

Margaret Tudor, by unknown artist, date unknown. The Royal Collection.
This is a partial image of a much larger portrait painting.

I am presuming this image of Margaret Tudor, which is shown in full b&w in the book The Rose and The Thorn, is before Margaret married James IV of Scotland, which officially occurred in August 8, 1503 when she was thirteen years old. There is no further information on the painting in that book.

The Tudor Place's biography on Margaret Tudor states the painting was by Daniel Mytens, but according to the National Portrait Gallery, Daniel Mytens was an Anglo-Dutch portrait painter who came to London around 1618; much too late to have painted this portrait.

Image from World Roots.com, Margaret Tudor [Art] Retrieved August 9, 2005 from the World Wide Web: http://worldroots.com/brigitte/royal/wales/wales-e.htm