Here is the marriage record of Teodor Kosin and Anna Peścińska, in Bieżuń, 10 Feb 1862.
Teodor Kosin, a bachelor, born in Bieżuń town, Mława county, son of Franciszek and Justyna nee Konacka (maybe should be Koniecka), age 21, residing with his parents in Bieżuń.
Anna Joanna Pesińska [sic!], a virgin, born in Bieżuń from Paweł and Maryanna nee Abramska, age 17, residing with her parents in Bieżuń.

Marriage record Nr 7
http://metryki.genealodzy.pl/metryka.php?ar=13&zs=0615d&...
In 1881 he secondly married Rozalia Błaszczak, d. of Mikołaj and Katarzyna nee Kapela.
http://metryki.genealodzy.pl/metryka.php?ar=13&zs=0615d&...