Complex sentence: She left in a huff and moved across Henley Street, where she set up a shop displaying what she claimed were genuine Shakespeare curiosities, competing with the'official' house across the road for the patronage of visitors.
Split into simpler sentences: She left in a huff and subsequently moved across Henley Street, and there set up a shop displaying what she claimed were genune Shakespeare curiosities. This'unofficial' Shakespeare centre vied with the'official' house across the road for the patronage of visitors.