While there he courted and married his wife, Nilza Niederauer Alvares, as well as writing opinion pieces for the local newspaper.
But he missed the intellectual and cultural life of Santa Maria, so in 1937 he again returned home, where he devoted himself to medicine and teaching.
[1] Beltrão was strongly influenced by Llewellyn Ivor Price, and he undertook an intense survey of the paleontological finds from in and around Santa Maria.
He abandoned his planned second volume which would have brought the history up to about 1960, and instead published his translation of Friedrich von Huene's paleontological work about Santa Maria, as well as a biography of Colonel João Niederauer Sobrinho (1827–1868) a hero of the Paraguayan War.
[3] He continued to write for the local newspaper and compiled a geographical dictionary of the Santa Maria municipality, which was never published.