[WALLIS Łukasz] Herman Dónaj - Kolędy górnośląskie czyli opis zwyczaji ludowych...Bytom 1925.

Lukasz Wallis a.k.a. Herman Dónaj, Jacek from Wygiełzów (1863-1940) - Polish folklorist, author of a collection of several hundred folk songs, documenter of customs, proverbs, legends and tales of the Silesian people.

He was born in Rozbark (now a district of Bytom) as the son of Jan and Joanna née Kawka. He worked as a mining machinist in the Rozbark coal mine. He participated in meetings of the St. Aloysius Society. He began collecting Silesian folk songs at the age of 23 in 1886. Thanks to the mediation of Father Jan Kudera and Emil Szramek, the collection of Lukasz Wallis was given to the Polish Academy of Arts and Sciences in Cracow. In his autobiography he wrote that he also collected Polish books and newspapers. He borrowed books from Wojciech Ziob, owner of a bookstore at the Church of the Virgin Mary in Bytom, who kept the library of the Polish Casino. In 1918 he purchased books from Wawrzyniec Hajda.