Book 1
10.2
Therefore encountering Demetrius at Amphipolis he came near to being expelled from Thrace288 B.C., but on Pyrrhus' coming to his aid he mastered Thrace and afterwards extended his empire at the expense of the Nestians and Macedonians. The greater part of Macedonia was under the control of Pyrrhus himself, who came from Epeirus with an army and was at that time on friendly terms with Lysimachus. When however Demetrius crossed over into Asia and made war on Seleucus, the alliance between Pyrrhus and Lysimachus lasted only as long as Demetrius continued hostilities; when Demetrius submitted to Seleucus, the friendship between Lysimachus and Pyrrhus was broken, and when war broke out Lysimachus fought against Antigonus son of Demetrius and against Pyrrhus himself, had much the better of the struggle, conquered Macedonia and forced Pyrrhus to retreat to Epeirus.
10.3
Love is wont to bring many calamities upon men. Lysimachus, although by this time of mature age and considered happy in respect of his children, and although Agathocles had children by Lysandra, nevertheless married Lysandra's sister Arsinoe. This Arsinoe, fearing for her children, lest on the death of Lysimachus they should fall into the hands of Agathocles, is said for this reason to have plotted against Agathocles. Historians have already related how Arsinoe fell in love with Agathocles, and being unsuccessful they say that she plotted against his life. They say also that Lysimachus discovered later his wife's machinations, but was by this time powerless, having lost all his friends.