 While emphasizing regional differences, Volters wrote that Latvians living in three regions (Courland, Vidzeme, and Latgale) were indeed one nation.Volters created and published several questionnaires to collect ethnographic data, including 50-question "Program for Indicating the Peculiarities of Lithuanian and Samogitian Dialects" (1886), 950-question "A Program for Collecting Folk Spiritual Heritage" (1892; prepared by students at the Saint Petersburg University under Volters' supervision), and 151-question "Ethnographic Data about Latvians" (1892; questions on Joninės or St. John's Day; published as in a supplement to "Dienas Lapa").The largest questionnaire primarily dealt with the old Latvian mythology and religion, family and traditional customs, but also had smaller sections on geography and history, anthropology, dwellings, clothing, food and drink, occupations, language and writings.