The zipfile contains the project directory which includes the source code and datasets used in the paper on Climate-driven introduction of the Black Death and successive plague reintroductions into Europe, as published in Proceedings of the National Academy of Sciences (PNAS). Access the paper at http://www.doi.org/pnas.1412887112 If you are not familiar with Clojure, Leiningen, and its project directory format, see http://clojure.org/getting_started for one of the IDE's to run the clojure code in, and use http://leiningen.org/ as the project / dependency manager.