His memoirs, Aus Polens und Kurlands letzten Tagen (Berlin,
1897) were published by Alfons Heyking the
Elder.
Find other Nordic Authors named Heyking,
others born in 1752
or deceased in 1796.
Look for more information in
Det Kgl. Bibliotek,
Google (search,
book search),
Hathi Trust,
Internet Archive,
Kansalliskirjasto (catalog,
digi,
metadata),
Kungl. biblioteket (Libris,
tidningar),
Nasjonalbiblioteket (aviser,
bøker,
Oria,
tidsskrifter),
Project Gutenberg,
Yahoo.