Simplify the following text for a Grade 6 native English-speaking person.
Original: Along with his younger brother Richard of Shrewsbury , Duke of York , Edward was one of the Princes in the Tower , who disappeared after being sent ( ostensibly for their own safety ) to the Tower of London .
Simplified: He sent Prince Edward to live in the Tower of London and wait for his coronation . He also got Edward 's younger brother , Prince Richard , Duke of York , to come and live at the Tower .