When Vicki left home to be a ballet student at Sadler 's Wells in London , Hill missed her .
When Vicki left home to be a ballet student at Sadler 's Wells in London , Hill began to write her Dream of Sadler 's Wells series .
When Vicki left home to be a ballet student at Sadler 's Wells in London , Hill missed her and began to write her Dream of Sadler 's Wells series .