The poem that Vanessa references, Alastor, was written by Percy Shelley, husband to Mary Shelley. Mary Shelley authored Frankenstein.
The ship Ethan, Sir Malcolm and Kaetenay are travelling on is the RMS Umbria. It was built in 1884 and together with her sister ship, the Etruria, it was the largest ship in service at that time.
The woman that plays the creature's wife is actually married to Rory Kinnear in real life.