The incident became known, and so loud and insistent was the popular clamour that the court physician, Berger, became frightened, and insisted on some modification of the Crown Prince's treatment. Henceforth the boy was allowed to wear shoes and stockings, given warmer clothing, and his room was slightly heated in the winter. His diet was also made a little fuller; his rice was boiled in mutton-broth, and he was given meat-soup for dinner. His education, however, was still left severely alone, and at the age of four he could not speak any language properly, but only a jargon of Danish and German, which he had learnt from his playmate. The excuse put forward for this retarded education was that the boy was far from strong, and it was the Queen's object to see his health thoroughly established before she burdened his strength with studies. The Queen, as a rule, was indifferent to public criticism, but she was much hurt at the strictures passed on her for her treatment of her son, especially those made by foreign courts. It is possible that some remonstrance may have reached her from England, either from her mother or her brother, for she had drawings made of the Crown Prince, showing him with his little rake and spade and watering-can, playing in the garden, or leaning against his mother, all designed to show how healthy and happy he was. These were given to the foreign envoys for transmission to their respective courts.[159] [159] Some rough sketches of these little pictures--in water-colours--are preserved in the royal archives at Copenhagen. The best answer to this charge against the Queen is to be found in the fact that the Crown Prince threw off his early weakness, grew up a strong and healthy boy, and developed into a vigorous man, who lived to a sound old age. All through his life the Crown Prince Frederick (who afterwards became Frederick VI.) was able to endure much more fatigue than an ordinary man, and he always adhered to the simple and frugal habits to which he had been inured when a child. The King and Queen remained at Hirschholm until late in the autumn, and then removed to the castle of Frederiksberg, near Copenhagen. Struensee and Brandt accompanied them in close attendance. Struensee now was a permanent inmate of the royal palaces, and wherever the court went he went too--a special suite of rooms adjacent to, or communicating with, the Queen's apartments were set apart for him.[160] [160] The castle of Frederiksberg is not much changed to this day, and a secret door is still shown which, tradition says, led from Struensee's apartments to those of the Queen.