The Maltese Falcon

"Do you want a drink, angel?" - Sam Spade

If Brigid O'Shaunessey did want a drink,  it would most certainly be the:  


2 oz. Dry gin 

½ oz. Fresh lime juice 

1 dash Angostura 

2 dashes White crème de menthe   

Shake with ice, strain and pour. Add mint sprig.