Complex sentence: In Rothbury he met Mary Hindhaugh, daughter of Robert Hindhaugh (who ran the Rothbury Brewery) and they married in 1869, living "above the store" in Coquetdale House.
Split into simpler sentences: In Rothbury he met Mary Hindhaugh, daughter of Robert Hindhaugh (who ran the Rothbury Brewery). They married in 1869 and lived "above the store" in Coquetdale House.