The article investigates the source of the historiographical topic of heroic paganism in the laments/elegies of Dionizas Poška (1764–1830). It is known that Poška read the manuscript of the first history of Lithuania (1822) by Simonas Daukantas (1793–1864). The article hypothesises that the choice of Poška’s written language ‘to lean towards the Samogitian dialect’, and the increase in a lexicon characteristic of the historiographical genre in the laments, are connected with his reading Daukantas’ manuscript. Since until now researchers into Daukantas’ legacy do not agree on the date of the completion of his first manuscript history, it is believed that research of this kind will make it possible to clarify it. The research leads to the conclusion that Poška read the ‘History of Lithuania’ by Daukantas in 1824, because in verse dating from that year we find a lexicon which is characteristic of Daukantas’ work. In elegies written after 1824, Poška found Lithuanian equivalents of the traditional topics of the heroic and lost nation, which are often taken from the text of Daukantas, and are not literal translations of Polish literature. Daukantas’ text inspired Poška to talk about a lost Golden Age, and so he can be considered a pioneer of Lithuanian historical elegy. Following Daukantas, the poet learned to replace rhetorical writing with an authentic expression of thought characteristic of Romantic authors.