Izzy Previn, alias Issac O'Brien, stout, dark, beady-eyed bookie with large ears who enters a bookmaking partnership with S.F. Ukridge in The Long Arm of Looney Coote at 3 Blue Street, St. James's, telegraphic address "Ikobee, London." Decamps with cash in The Exit of Battling Billson.

• The Long Arm of Looney Coote
• The Exit of Battling Billson