Ardilla

Ardilla, 1808.

The "eighteen-gun Spaniard Ardilla… was probably carrying silver when she vanished en route from Louisiana to Spain in 1808." (Quasar, p. 57.)

Obviously, like with the Anne, during the Age of Sail, all kinds of things could happen to ships, and without radios, no one would ever hear about it. Doesn't mean the Martians got her. Doesn't mean they didn't get her, either. Tossup. Think or believe what you want.