Skopje, Strouga, Monastir were known to self-witnesses travellers as having primarily a Bulgarian population. Everybody knew the population of Macedonia was mixed since there were No "Macedonians" as FYROM propagandists would wish but instead Bulgarians, Greeks, Albanians, Turks, Serbs and Vlachs.  

Quote: The language of these various populations divides itself into two principal idioms: each of these into three where the difference is less. Of the Southern dialect are the Slovaks, the Serbs and Bulgarians; of the Northern, the Bohemians, Poles, and Russians. Vacation Tourists and Notes of Travel in 1860 By Francis Galton Published 1861 Macmillan and ...