Soon she had so many kids on tap that we could keep all of Alvarez’s spies under surveillance. With Mike able to listen at any phone and a child spotting it whenever a spy left home or place of work or wherever—with enough kids on call so that one could phone while another held down a new stakeout—we could keep a spy under tight observation and keep him from seeing anything we didn’t want him to see. Shortly we were getting reports spies phoned in without waiting for Zebra File; it did a sod no good to phone from a taproom instead of home; with Baker Street Irregulars on job Mike was listening before he finished punching number.