 In his last years Wallace reverted to his youthful self and devoted himself to study again.He didn't publish anything after his last book, "The Web of Empire", in 1902.He contributed briefly to the editing of the 10th edition of the Encyclopædia Britannica, but in March 1901 he was taken from his "Britannica" duties by the Duke of Cornwall and York, (the future King George V), who asked Wallace to act as his Private secretary during an extensive world tour.