M-W and OED have the same 1937 quote. Using newspaperarchive--- 27 Oct. 1930 _The Gettysburg(PA) Times 4/3 (A syndicated column by O. O. McIntyre) <<To breakfast and asked a lady across table for the sugar bowl, but she swished her newspaper and scowled. And upon departing was almost tempted to say: "My error, Countess Sourpuss.">>