The word infallibly appears in the following sentences from Moby-Dick:
Chapter 1 > Paragraph 5 > Sentence 5:
Let the most absent-minded of men be plunged in his deepest reveries—stand that man on his legs, set his feet a-going, and he will infallibly lead you to water, if water there be in all that region.
Chapter 9 > Paragraph 10 > Sentence 1:
"Screwed at its axis against the side, a swinging lamp slightly oscillates in Jonah's room; and the ship, heeling over towards the wharf with the weight of the last bales received, the lamp, flame and all, though in slight motion, still maintains a permanent obliquity with reference to the room; though, in truth, infallibly straight itself, it but made obvious the false, lying levels among which it hung.
Chapter 16 > Paragraph 1 > Sentence 2:
But to my surprise and no small concern, Queequeg now gave me to understand, that he had been diligently consulting Yojo—the name of his black little god—and Yojo had told him two or three times over, and strongly insisted upon it everyway, that instead of our going together among the whaling-fleet in harbor, and in concert selecting our craft; instead of this, I say, Yojo earnestly enjoined that the selection of the ship should rest wholly with me, inasmuch as Yojo purposed befriending us; and, in order to do so, had already pitched upon a vessel, which, if left to myself, I, Ishmael, should infallibly light upon, for all the world as though it had turned out by chance; and in that vessel I must immediately ship myself, for the present irrespective of Queequeg.
Chapter 32 > Paragraph 9 > Sentence 3:
I promise nothing complete; because any human thing supposed to be complete must for that very reason infallibly be faulty.
Chapter 32 > Paragraph 37 > Sentence 2:
But the creatures set down above as Duodecimoes are infallibly whales, by the terms of my definition of what a whale is—i.e. a spouting fish, with a horizontal tail.
Chapter 44 > Paragraph 8 > Sentence 5:
So that though Moby Dick had in a former year been seen, for example, on what is called the Seychelle ground in the Indian ocean, or Volcano Bay on the Japanese Coast; yet it did not follow that were the Pequod to visit either of those spots at any subsequent corresponding season, she would infallibly encounter him there.
Chapter 60 > Paragraph 2 > Sentence 6:
As the least tangle or kink in the coiling would, in running out, infallibly take somebody's arm, leg, or entire body off, the utmost precaution is used in stowing the line in its tub.
Chapter 60 > Paragraph 4 > Sentence 5:
Second: This arrangement is indispensable for common safety's sake; for were the lower end of the line in any way attached to the boat, and were the whale then to run the line out to the end almost in a single, smoking minute as he sometimes does, he would not stop there, for the doomed boat would infallibly be dragged down after him into the profundity of the sea; and in that case no town-crier would ever find her again.
Chapter 98 > Paragraph 4 > Sentence 1:
But mark: aloft there, at the three mast heads, stand three men intent on spying out more whales, which, if caught, infallibly will again soil the old oaken furniture, and drop at least one small grease-spot somewhere.
Chapter 124 > Paragraph 8 > Sentence 2:
Standing behind him Starbuck looked, and lo! the two compasses pointed East, and the Pequod was as infallibly going West.
Chapter 130 > Paragraph 9 > Sentence 2:
Because in such a wilderness of running rigging, whose various different relations aloft cannot always be infallibly discerned by what is seen of them at the deck; and when the deck-ends of these ropes are being every few minutes cast down from the fastenings, it would be but a natural fatality, if, unprovided with a constant watchman, the hoisted sailor should by some carelessness of the crew be cast adrift and fall all swooping to the sea.
Concordance for the word infallibly from Moby-Dick.