Many thanks to the Davy Crockett Almanack for leading me to The Tainted Archive, and their post on "How to Emulate THE SAINT On A Limited Budget." The tips include:
3- You must maintain an air of mystery. To truly emulate the Saint you must create an aura of unpredictability around yourself. Always get up and hour or so before your young lady and sneak out, not returning sometimes for weeks on ends. Never say where you've been and always counter questions with other questions such as, 'has a bald oriental man been around looking for me?' or 'Life's too short. Let's go eat oysters and sip bubbly.' Another way to become an enigma is to jump up, asking if it's the police every-time the doorbell rings. When you do this slip a hand into your suit pocket as if you are reaching for a non existent gun. Whilst it is understood that some of these things will be difficult for a married Saint – it can still be done. Simply carry out the steps listed above but prepare yourself for divorce proceedings. Disappearing for weeks on end has been known to annoy certain wives.