His father , Albert Bumke ( 1843 - 1892 ) was the son of a brewer , and his mother Emma ( 1850 - 1914 ) was the daughter of a factory owner .
Oswald Bumke 's parents were solidly middle class .
Oswald Bumke 's father , Albert Bumke ( 1843 - 1892 ) was the son of a brewer , and his mother Emma ( 1850 - 1914 ) was the daughter of a factory owner .
Oswald Bumke 's parents were solidly middle class .