On the 18th of October, 1825, the Asia, a high-built Spanish ship, and the Constanzia, a brig of eighteen guns, cast anchor off the island of Guajan, one of the Mariannas. The crews of these vessels, badly-fed, ill-paid, and harassed with fatigue during the six months occupied by their passage from Spain, had been secretly plotting a mutiny.The spirit of insubordination more especially exhibited itself on board the Constanzia, commanded by Captain...