P rincess Nell remained in Castle Turing for several months. During her 
quest for the twelve keys, she had entered many castles, outwitted their 
sentries, picked their locks, and rifled their treasuries; but Castle Turing 
was an altogether different place, a place that ran on rules and programs that 
were devised by men and that could be rewritten by one who was adept in the 
language of the ones and zeroes. She need not content herself with sneaking in, 
seizing a trinket, and fleeing. Castle Turing she made her own. Its demesne 
became Princess Nell's kingdom.