The surface meaning is: he left Antonia, abandoned by Father Corbelan and her
servants, to be evacuated from Sulaco by Mrs Gould before Pedro Montero's arrival.
But why not say "the Goulds?" Charles Gould would have seen to her evacuation
equally well. On the surface, Mrs Gould is the altruist, and Decoud naturally
thinks of her when someone needs "care." But there is also something
allegorical in abstract idealism (Antonia) being left in the care of altruism
at this point. Until now idealism has relied on the nation as the means to advance
mankind, but now the nation lies in ruins around them, so idealism "tacitly"
falls under the wing of altruism; that is, it reverts to nothing more than the
desire to advance mankind.