The work is a publication of documents from the archive papers of academician Peter A. Lavrov (1856-1929) in the St. Petersburg Branch of the Archive of the Russian Academy of Sciences. This is a letter from a Montenegrin correspondent named Nikolo Vučković (1901), a text of ethnographic content «Црногорски обичаj о свадби» [«Montenegrin wedding customs»] (fragment), that was by him with Serbian Cyrillic alphabet written, as well as a narrative dedicated to the sovereign of Zeta in 1465-1490 Ivan Crnojević and one of the members of his nobility - Božina Sarap. There are reasons to make assumptions about the identity of N. Vučković, in which one can see a representative of the Vučkovićs, raising their family to the Božina Sarap, namely Nikola Vučković, whose public, municipal and journalistic activities fall at the end of the 19th - early 20th century. Published documents from the papers of P. A. Lavrov not only contain evidence of the ethnographic interests of the academician, material o
