Millwaters knew Mr. Perkwite very well as a promising young barrister whom Carless and Driver sometimes favoured with briefs. Mr. Perkwite's presence did not disturb him; he moved into the farther corner, and Mr. Perkwite slipped inside. The car moved off in pursuit of the one in front. "So you're on that game, Mr. Perkwite?" remarked Millwaters. "Ah! And who might have got you on to it, if one may ask?" "You know that I was at your people's office yesterday?" said Perkwite. "Saw you there," replied Millwaters. "It was about this business," said the barrister. "Did you see me in the police-court this morning?" "I did--listening for all you were worth," answered the clerk. "And I dare say you saw me go with the rest of them to Mr. Viner's, in Markendale Square?" said Perkwite. "Right again, sir," assented Millwaters. "I did." "This fellow in front," observed Perkwite, "made some statements at Viner's, in answer to your principal, Mr. Carless, which incline me to the opinion that he's an impostor in spite of his carefully concocted stories." "Shouldn't wonder, Mr. Perkwite." said Millwaters. "But that's not my business. My job is to keep him under observation." "That's what I set out to do when I came out of Viner's," said the barrister. "He's up to something. He assured us as we left the house that he'd a most pressing engagement at his hotel in Lancaster Gate; the next minute, happening to glance down a side-street, I saw him cutting off in the direction of Paddington. And now he's evidently making for the City." "Well, I'm after him," remarked Millwaters. He leaned out of his window, called the chauffeur, and gave him some further instructions. "Intelligent chap, this, Mr. Perkwite," he said as he sat down again. "He understands--some of 'em are poor hands at this sort of game." "You're a pretty good hand yourself, I think?" suggested the barrister, with a smile. "Ought to be," said Millwaters. "Had plenty of experience, anyway." It seemed to Perkwite that his companion kept no particular observation on the car in front as it sped along to and through the northern edge of the City and beyond. But Millwaters woke to action as their own car progressed up Whitechapel Road, and suddenly he gave a warning word to the barrister and a smart tap on the window behind their driver. The car came to a halt by the curb; and Millwaters, slipping out, pushed some money into the man's hand and drew Perkwite amongst the people who were crowding the sidewalk. The barrister looked in front and around and seemed at a loss. "Where is he?" he asked. "Hang it, I've lost him!" "I haven't!" said Millwaters. "He left his car before we left ours. Our man knew what he was after--he slowed up and passed him until I saw where he went." He twisted Perkwite round and pointed to the mouth of a street which they had just passed.