Fics like if convenient, come at once

On Christmas Eve, a battered antique postcard arrived in Barry’s mailbox. The message on the back was hastily scrawled, at odds with the festive ice skating illustration on the front. Smudged charcoal spelled out a pair of unfamiliar coordinates, a message calling in an unspecified favor, and a time: just before midnight, December 24, 1863. Beneath that was a fingerprint, as familiar to Barry as the dead man it belonged to.

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