Pretty sure he's German (https://translate.google.com/?hl=de&sl=de&tl=en&text=Sitzung&op=translate).
Sinaf
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Pretty sure he's German (https://translate.google.com/?hl=de&sl=de&tl=en&text=Sitzung&op=translate).
The psittacosis pandemic of 1929-1930 would be my guess.
It was mentioned in the psittacosis article someone posted.