In the 16th and 17th century Michael Brüggemann (also known as Pontanus or Michał Mostnik), Simon Krofey (Szimon Krofej) and J.M. Sporgius introduced Kashubian into the Lutheran Church. Krofey, pastor in Bütow (Bytow), published a religious song book in 1586, written in Polish but also containing some Kashubian words. Brüggemann, pastor in Schmolsin, published a Polish translation of some works of Martin Luther (catechism) and biblical texts, also containing Kashubian elements. Other biblical texts were published in 1700 by Sporgius, pastor in Schmolsin. His "Schmolsiner Perikopen", most of which is written in the same Polish-Kashubian style as Krofey's and Brüggemann's books, also contain small passages ("6th Sunday after Epiphany") written in pure Kashubian. Scientific interest in the Kashubian language was sparked by Christoph Mrongovius (publications in 1823, 1828), Florian Ceynowa and the Russian linguist Aleksander Hilferding (1859, 1862), later followed by Leon Biskupski (1883, 1891), Gotthelf Bronisch (1896, 1898), Jooseppi Julius Mikkola (1897), Kazimierz Nitsch (1903). Important works are S. Ramult's, "Słownik jezyka pomorskiego, czyli kaszubskiego", 1893, and Friedrich Lorentz, "Slovinzische Grammatik", 1903, "Slovinzische Texte", 1905, and "Slovinzisches Wörterbuch", 1908. Zdzisław Stieber was involved in producing linguistic atlases of Kashubian (1964–78). The first activist of the Kashubian national movement was Florian Ceynowa. Among his accomplishments, he documented the Kashubian alphabet and grammar by 1879 and published a collection of ethnographic-historic stories of the life of the Kashubians ("Skórb kaszébsko-slovjnckjé mòvé", 1866–1868). Another early writer in Kashubian was Hieronim Derdowski. The Young Kashubian movement followed, led by author Aleksander Majkowski, who wrote for the paper "Zrzësz Kaszëbskô" as part of the "Zrzëszincë" group.