Definition of "uninvitedly"

This was strangely heightened at times by the ragged Elijah's diabolical incoherences uninvitedly recurring to me, with a subtle energy I could not have before conceived of.

1851 November 14, Herman Melville, Moby-Dick; or, The Whale, 1st American edition, New York, N.Y.: Harper & Brothers; London: Richard Bentley