Why did Herman Melville leave the Acushnet in the Marquesas Islands?

Herman Melville did not leave the Acushnet due to a specific, documented reason other than his decision to "jump ship" in July 1842 while the vessel was anchored in the Marquesas Islands.1

While his first novel, Typee, romanticizes this departure and suggests he spent months living among the Typee people to escape the pressures of civilization, historical records indicate he was registered as a crew member on the Australian whaler Lucy Ann by August 1842. The voyage on the Acushnet had been unproductive, but the specific motivations for his desertion remain a blend of his actual experiences and the imaginative narrative he later crafted for his literary work.1