Polybius discovered the documents of a series of treaties between Rome and Carthage in a library in Rome. One of them, the fourth one, was against Pyrrhus. It stipulated that: "If they make an alliance with Pyrrhus, both shall make it an express condition that they may go to the help of each other in whichever country is attacked. No matter which require help, the Carthaginians are to provide the ships for transport and hostilities, but each country shall provide the pay for its own men. The Carthaginians, if necessary, shall come to the help of the Romans by sea too, but no one shall compel the crews to land against their will." Livy's Periochae placed the conclusion of this treaty after the Battle of Asculum.