A small white cloud, which had attracted Dantes’ attention, crowned the summit of the bastion of the Chateau d’If.
But the skilful manner in which Dantes had handled the lugger had entirely reassured him; and then, when he saw the light plume of smoke floating above the bastion of the Chateau d’If, and heard the distant report, he was instantly struck with the idea that he had on board his vessel one whose coming and going, like that of kings, was accompanied with salutes of artillery.
There are no more uses of "bastion" in the book.
Show samples from other sources
These rules are a bastion against corruption.
The universities were the last bastion of freedom, but they were purged of anyone who questioned official propaganda shortly after the coup.