Complete Works of Virginia Woolf: The Voyage Out
The piece of information that died within him was to the effect that three hundred years ago five Elizabethan barques had anchored where the Euphrosyne now floated. Half-drawn up upon the beach lay an equal number of Spanish galleons, unmanned, for the country was still a virgin land behind a veil.
a sailing ship with three or more masts ( = posts that support the sails)
if a machine, a vehicle, a place or an activity is unmanned, it does not have or need a person to control or operate it.