Here are some citings for "finger of fate," and some variations of "digit of destiny"
The Basketball Mystery (1939).
Writer: Gardner Fox. Art: Fred Guardineer. The owner of a basketball team asks Speed to figure out who is involved when crooked gamblers start putting influence on the team. This sports mystery is just plain fun.
At one point, Fox's script states that "Faro is foiled by the fickle finger of fate
"Is that his child?" said Madame Defarge, stopping in her work for the first time, and pointing her knitting-needle at little Lucie as if it were the finger of Fate.
"Yes, madame," answered Mr. Lorry; "this is our poor prisoner's darling daughter, and only child."
~ Tale of Two Cities (1859) by Charles Dickens
I was rather struck by the coincidence, having already heard it at the theatre. It seemed to me like the finger of fate. Excuse my being so superstitious.
~Virgin Soil (1877) - Turgenev
http://www.classicreader.com/booktoc.ph ... okid.1283/
I one forenoon in this last November received a turn that appeared to be given me by the finger of Fate and Conscience, hand in hand.
~ Somebody's Luggage (1894) - Charles Dickens
doodled by the digit of destiny
the dangling digit of destiny, otherwise known as the fickle finger of fate
the devious digit of destiny (otherwise known as the fickle finger of fate)
the diabolical digit of destiny