This study focuses on the poetic work of František Gellner. Its objective is to confirm or refute the assumption that Gellner’s work can be divided into two distinctive periods. By means of statistical tests it establishes the relevance of the differences between early (1894–1906) and late (1910–1914) Gellner, concluding that within the observed parameters (the proportion of binary and trinary metres; iambs and trochees; fourfoot and five-foot iambs; monosyllabic and polysyllabic iambic incipits; verses with and without enjambement; strophic and non-strophic poems; four-verse and twoverse strophes; alternating and couplet rhymes), statistically significant differences are identified. The difference in his first work Po nás ať přijde potopa! (After us the Flood!) and its inclination towards 1890s (and Lumír) poetics was also established. Attention was also focused on the difference between Gellner’s poems included in his collections and those that remained in journal publication form (triple metres as a factor supporting the inclusion of a poem in a book publication), as well as the specific nature of the epic verses (more polysyllabic incipits, more enjambement). In several places the metric similarity was pointed out between specific poems and poems by other authors (Otokar Březina, Svatopluk Čech, Josef Svatopluk Machar, Jan Neruda and Jaroslav Vrchlický).