Read it through once

First: I have personally known three instances where a whale, after receiving a harpoon, has effected a complete escape; and, after an interval (in one instance of three years), has been again struck by the same hand, and slain; when the two irons, both marked by the same private cypher, have been taken from the body. In the instance where three years intervened between the flinging of the two harpoons; and I think it may have been something more than that; the man who darted them happening, in the interval, to go in a trading ship on a voyage to Africa, went ashore there, joined a discovery party, and penetrated far into the interior, where he travelled for a period of nearly two years, often endangered by serpents, savages, tigers, poisonous miasmas, with all the other common perils incident to wandering in the heart of unknown regions. Meanwhile, the whale he had struck must also have been on its travels; no doubt it had thrice circumnavigated the globe, brushing with its flanks all the coasts of Africa; but to no purpose. This man and this whale again came together, and the one vanquished the other. I say I, myself, have known three instances similar to this; that is in two of them I saw the whales struck; and, upon the second attack, saw the two irons with the respective marks cut in them, afterwards taken from the dead fish. In the three-year instance, it so fell out that I was in the boat both times, first and last, and the last time distinctly recognized a peculiar sort of huge mole under the whale’s eye, which I had observed there three years previous. I say three years, but I am pretty sure it was more than that. Here are three instances, then, which I personally know the truth of; but I have heard of many other instances from persons whose veracity in the matter there is no good ground to impeach.