Nearly there (with assistance) but am stuck on the last 3 and need one explaining
(1) OK about left - a sign of change in polish letters O?O?E?;
Oil container held nu my Latin or Greek Healer and "author" ME???PUS
and unusually rare editor - in short, something to do with good books R?R???.
Also Middle-eastern ambassador sounding pleasant takes in a king loses nothing for which it works out as E(U)P(H)R(O)N(I)U(S) which I absolutely dont get! The letters in brackets are the initial blanks