The voyages and travels of the ambassadors sent by
Frederic Duke of Holstein, to the Great Duke of Muscovy and the
King of Persia. London, For John Starkey and Thomas Basset,
1669.
“A new map of Liefland
” P. 31
Olearius was secretary to the embassy sent out by the duke of
Holstein in 1633
–34 to explore commercial opportunities in Persia
and Russia. This map shows in detail the Baltic provinces of
Curland, Esthonia, Latvia and Lithuania.