Long afterward, the mage still could not pinpoint what had alerted him. It wasn’t his spell lock to detect enemies, which wouldn’t have homed in on an assassin whose target was somebody else. Nor was help from any other magic, for Serrin had no spells going. Trying to run spells in the middle of a place crawling with Knight Errants wouldn’t have gotten him more than an abrupt but efficient escort straight off the campus.