I wrote an article about horse movies, and mentioned that "Pie," the horse in the 1944 film "National Velvet," was played by a horse named King Charles, who was a grandson of Man o'War. A reader has asked about the bloodlines for King Charles. Would you be able to help? I found two horses named King Charles, one a foal of 1925, another a foal of 1933, who might possibly have been used in the film, but it appears that neither descended from Man o'War. I'd like to answer this reader, if you have any information. Thanks for your help.