Still the English Court was probably never seen to greater advantage than during that year of miracles, and it is clear that the young Prussian Prince saw for the first time a Royal family leading a happy, natural life, full of affection and kindness. Queen Victoria's children were healthy, well-mannered, and devoted to their parents, and the leader and head of the little band was the Princess Royal, full of eager interest in everything she was allowed to see and know, blessed with high spirits and a keen sense of humour even then already well developed. She was adored by her father, and encouraged in every way to "produce herself," to use an expressive French phrase. Prince Frederick William could not but note the contrast between the young people whose friendship he was making at Windsor, and the shy, etiquette-ridden Royal children of the minor German courts. Nor could he help contrasting this delightful domestic scene with what he knew at home. At Berlin he was in constant contact with a Royal family profoundly disunited and unhappy. Only three years before his first visit to England he had stood at the palace window and seen the first shot fired in the Revolution of 1848. Although the Prince had a tenderly-loved sister, he had spent a lonely, austere youth, for his parents, though outwardly on good terms, were in no sense united as Queen Victoria and Prince Albert were united--indeed, it was an open secret that the Prince of Prussia had only one love in his life, Elise Radziwill. Prince Frederick William's sister was only a very little older than the Princess Royal. The two princesses formed on this visit a friendship destined never to be broken, and henceforth the Royal children called the Prince and Princess of Prussia "Uncle Prussia" and "Aunt Prussia." The Great Exhibition itself undoubtedly helped to strengthen Prince Frederick William's attraction to England. The palace of glass in Hyde Park absorbed the minds and thoughts of the whole Royal family, if only because all those who were old enough to understand anything of public affairs were aware that the success or failure of the enterprise would seriously affect the position of Prince Albert in England. The feeling among the Royal family is shown by a passage in a letter of Queen Victoria to Lady Lyttelton. Writing on May 1, the opening day of the Exhibition, Her Majesty said: "The proudest and happiest day of--as you truly call it--my happy life. To see this great conception of my beloved husband's mind--to see this great thought and work, crowned with triumphant success in spite of difficulties and opposition of every imaginable kind, and of every effort to which jealousy and calumny could resort to cause its failure, has been an immense happiness to us both."