Isaac James Cullin started his professional career as a portrait painter. However, his interest in horses and the adaptability of his skill led him to become one of the top equestrian artists. Cullin flourished as an artist between 1881 and 1920, producing racehorse portraits and watercolors of races, and equestrian events. In 1883 he and J. A. Wheeler collaborated to paint the year’s Grand National winner. He later produced sporting illustrations for The Illustrated London News.