Edward – who was then the Prince of Wales - said in his letter that the family only ever visited John “once or twice a year” and that his passing from a severe seizure in 1919 was the “greatest relief imaginable” to them.  • Edward VIII's Coronation portrait uncovered  The then Prince was in Germany visiting British troops at the time and appeared to try and use his brother's death as an excuse to return to England to visit his mistress, Freda Dudley Ward.  However, his father thwarted his plans by ordering him not to come back. As a result Edward did not attend his own brother's funeral and was not even sure what day it was on, his letter reveals.  John was diagnosed with epilepsy at the age of four and his condition worsened as he got older, although it was only revealed to the public after his death at the age of 13.  Wallis Simpson and her husband, the former Edward VIII (Rex fatures)  It has been said that the Royal family wanted to keep John's condition a secret as it could have shown the Royal blood was not as pure as was thought.  Edward, who later became King only to abdicate so he could marry American divorcee Wallis Simpson, wrote hundreds of love letter to his first mistress, Dudley Ward.  Over six pages, Edward wrote of how he desperately wanted to leave “filthy Rheinland and all these Huns” before learning of John's death on January 20, 1919.  He wrote: "I arrived yesterday to find a wire from HM (His Majesty) to say that my youngest brother had died. I wired back to say that I was returning to England at once for a few days which I thought was a good move.  Edward VIII's Coronation portrait uncovered (Illustrated London News)  "I had great and wonderful hopes of seeing toi tomorrow if the goddess of fortune had been kind to us. I'm so miserable darling as I've just got another wire from HM telling me not to return to England and just to carry on. Isn't it all too heartbreaking.  "Of course my little brother's death plunges me into mourning; don't think me very cold hearted sweethearted (sic) but I've told you all about that little brother darling and how he was an epileptic + might have gone West any day!!  "He's been practically shut up for the last two years anyhow no one has even seen him except the family and then only once or twice a year and his death is the greatest relief imaginable or what we've always silently prayed for.  "No one would be more cut up if any of other three brothers were to die than I should be, but this poor boy had become more of an animal than anything else"  "I was so, so happy last night at the thought of seeing toi tomorrow, just a teeny glimpse of toi.  "What does all the mourning in the world matter to toi et moi? I'm terribly sorry for my sister who was going to a lot of parties in Feb.  "Somehow I don't think this mourning will last very long as I think the funeral was today; it looks to me as if as little was being made of it all as possible.  "No one would be more cut up if any of other three brothers were to die than I should be, but this poor boy had become more of an animal than anything else and was only a brother in the flesh and nothing else."  • Edward VIII was racist and sexist, letter suggests  Auctioneer Darren Julien said: "This letter comes from a lady who bought all the love letters sent by Edward to Freda Dudley Ward some time ago. She has held onto them ever since.  The Duke and Duchess of Windsor, formerly King Edward VIII and Wallis Simpson (Evening Standard/Getty Images)  • Rolls-Royce used by Edward VIII to sneak Wallis Simpson out of Balmoral on sale for £120k  "I think the contents of the letter will cause a bit of a stir especially in Britain. It does show Edward's upset over the death of his brother but it also shows how John was the forgotten prince."  The letter is being sold by Julien's Auctions in Los Angeles, US, on Friday.
The future king said the royal family had 'silently prayed for' the death of   his sibling John, who suffered from severe epilepsy and autism