Zemsky Sobor
The name of Andrey Yakovlevich Shchelkalov first appeared in 1550, when he was entered in the so-called "Book of a Thousand" (Тысячная книга, or "Tysyachnaya kniga"). The book contained genealogical information on noble Muscovite families (1070 people altogether, hence, the name of the book) and their land allotments around Moscow. In 1560, Andrey Shchelkalov was assigned to the Lithuanian ambassadors as a police officer. Two years later, he became a "dyak" (government official). In 1566, Andrey Shchelkalov was promoted to the rank of "duma dyak" (the lowest rank in the Boyar Duma). He also took part in the "Zemsky Sobor" that same year and put his signature under its resolutions.