Short answers, pulled from the story.
Hans Holbein the Younger painted the final portrait of Jane Seymour in 1536. This work was created during the year when a single sheet of vellum in the Royal Collection held eighty-five preparatory drawings.
Lucas Horenbout began painting for Henry VIII in the mid-1520s. He worked alongside his sister Susannah and his father Gerard Horenbout who had been a member of the Ghent-Bruges school of manuscript illustrators.
John Browne died in office as the first Serjeant Painter in 1532. He was appointed to the role in 1527 and was succeeded by Andrew Wright.
Nicholas Hilliard received £400 as a gift in 1591. He also received an annuity of £40 from 1599 and typically charged £3 for a non-royal miniature.
The painting was correctly identified as Mary Nevill and her son Gregory Fiennes in 1986. George Vertue had originally identified the sitters as Lady Frances Brandon and Adrian Stokes in 1727.
Marcus Gheeraerts the Elder returned to England in 1585 after staying for nine years. He died sometime before 1589 following his return.