Busch was ravaged by disease, and for five months spent time painting and collecting folk tales, legends, songs, ballads, rhymes, and fragments of regional superstitions. Busch's biographer, Joseph Kraus, saw these collections as useful additions to folklore, as Busch noted the narrative background to tales and the idiosyncrasies of storytellers. Busch tried to release the collections, but as a publisher could not be found at the time, they were issued after his death. During the Nazi era Busch was known as an "ethnic seer".