What objects provide evidence of Sitric's rule over what is now mdern day Yorkshire?
Sitric II of Northumbria:  No contemporary texts mention Sitric and his existence is only evidenced by coins bearing his name which were minted at York in c. 942. Scandinavian York: Scandinavian York (also referred to as Jórvík) or Danish/Norwegian York is a term used by historians for the south of Northumbria (modern day Yorkshire) during the period of the late 9th century and first half of the 10th century, when it was dominated by Norse warrior-kings; in particular, used to refer to the city (York) controlled by these kings.
coins