Definition of "darbies"

Who's afraid of him, except the old governor who daresn't catch him and put him in double-darbies, as he deserves, but lets him go about kidnapping people […]

1851, Herman Melville, chapter 73, in Moby Dick‎

And he says, 'I'll go along quiet, Bobby,' he says, 'without the darbies,' he says.

1885, Lewis Carroll, “A Tangled Tale”, in The Complete Works of Lewis Carroll, New York: Vintage, published 1976, page 1058

Second watch: (Produces handcuffs) Here are the darbies.Penguin, 1992, p. 592,

1922 February, James Joyce, Ulysses, Paris: Shakespeare and Company, […]

Sentry, are you there? / Just ease this darbies at the wrist, and roll me over fair, / I am sleepy, and the oozy weeds about me twist.

1924, Herman Melville, chapter 26, in Billy Budd‎, London: Constable & Co.