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Books about Horenbout:
In Defense of the Queen (Susanna Horenbout & John Parker) (Volume 3) by Michelle Diener (Jul 30, 2013)
Gerard Horenbout und der Meister Jakobs IV. von Schottland by Michaela Krieger (Jun 1, 2012)
Wiki information Horenbout:
Lucas Horenbout, often called Hornebolte in England, was a Flemish artist who moved to England in the mid-1520s and worked there as "King's Painter" and court miniaturist to King Henry VIII from 1525 until his death. He was trained in the final phase...
Gerard Horenbout was a Flemish miniaturist, a late example of the Flemish Primitives. He is "likely and widely accepted" to be the Master of James IV of Scotland.