Great historical information about Balkan culture and geography. There is a lot about Macedonia. Beware of the different spellings of names, like:

Lake Presba
Resna (Resen)
Ocrida (Ohrid)
Bittoglia (Bitola)
Strouga (Struga)

You get the picture.

Travels in European Turkey, in 1850
http://books.google.bg/books?id=Db5z52QtmEUC&printsec=frontcover&dq=macedonia&hl=en&sa=X&ei=lwU2VPKDA8iryATP_ICwAg&ved=0CD8Q6AEwBjgK#v=onepage&q&f=false