Social Philately: Writer Henry Miller 1920 foreign packagecard vto Germany

By the world-famous writer Henry Valentine Miller (1891-1980), within young years hand described Dispatchcard of a foreign package to Archshofen/Germany mailed in New York, Buffalo station on January 22nd, 1920.
His mother was from Hessen / Germany and his father was from Bavaria / Germany and who have emigrated, to USA. The package went presumably to family or friends in Germany.
An unusual piece on a philatelic document, preservation appropriately good in the circumstances!