Every picture tells a story and nowhere more so than in a private collection, still hanging in the house for which it was bought. The collection at Wilton is one of the oldest in Britain, dating back to the seventeenth century, when the Earl of Pembroke was among Van Dyck’s earliest English patrons. Art historian and broadcaster Helen Rosslyn looks at works by artists as diverse as Raphael, Rembrandt and Reynolds and explores how they came to be at Wilton.