Mysterious Fields
The Mysterious Fields trilogy takes place in 1889 and 1890, with Thessaly and Vitus getting their happily-ever-after in book 3. Best read in order.
Charms of Albion
The Charms of Albion series collects books that take place in the Victorian and Edwardian era. All three connect to characters who appear in books in the 1920s and later at an earlier point in their lives.