Fur trade marten furs could generate in international markets spurred a "fur fever" in which many Russians moved to Siberia as independent trappers. From 1585 to 1680, tens of thousands of sable and other valuable pelts were obtained in Siberia each year. The primary way for the Muscovite state to obtain furs was by exacting a fur tribute from the Siberian natives, called a "yasak". "Yasak" was usually a fixed number of sable pelts which every male tribe member who was at least fifteen years old had to supply to Russian officials. Officials enforced "yasak" through coercion and by taking hostages, usually
Conservation and restoration of fur objects belonged to Louis XIV and Louis XV. "Its skin was varnished and stretched over a frame of wooden hoops." The skin is now on display at the Museum national d’Histoire naturelle in Paris, but is it unlikely it could be remounted. The care and cleaning of fur objects should always be undertaken by a trained collections manager or conservator. Provided there is no shedding issue, brushing is the first step in cleaning fur objects. Light brushing, using a paintbrush, will help dislodge any particulate soiling, surface dust, and insect frass. Stiffer natural brushes can be used if the dirt is