Look at the sailor, called the mincer, who now comes along, and assisted by two allies, heavily backs the grandissimus, as the mariners call it, and with bowed shoulders, staggers off with it as if he were a grenadier carrying a dead comrade from the field. Extending it upon the forecastle deck, he now proceeds cylindrically to remove its dark pelt, as an African hunter the pelt of a boa. This done he turns the pelt inside out, like a pantaloon leg; gives it a good stretching, so as almost to double its diameter; and at last hangs it, well spread, in the rigging, to dry. Ere long, it is taken
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In case it isn't clear, this is the whale's penis. The man is making a jacket out of the whale's penis and wearing it.