Complex sentence: In 1869, he employed the architect R. Norman Shaw to enlarge Cragside; in two phases of work between 1869 and 1882, he transformed the house into a northern Neuschwanstein.
Split into simpler sentences: In 1869, he employed the architect R. Norman Shaw to enlarge Cragside. In two phases of work between 1869 and 1882, they transformed the house into a northern Neuschwanstein.