Characters in The Hidden Staircase

Nancy Drew

Also in The Secret of the Old Clock, The Bungalow Mystery, Together with the Hardy Boys, The Mystery at Lilac Inn, The Secret at Shadow Ranch, The Secret of Red Gate Farm, The Clue in the Diary, Nancy Drew, Girl Detective, Nancy's Mysterious Letter, The Sign of the Twisted Candles

The Elderly Owners

Carson Drew

Also in The Secret of the Old Clock, The Mystery at Lilac Inn, The Secret at Shadow Ranch, The Secret of Red Gate Farm, Password to Larkspur Lane, The Message in the Hollow Oak, The Clue of the Tapping Heels, The Mystery of the Brass Bound Trunk, The mystery at the moss-covered mansion, The clue in the jewel box

Hannah Gruen

Also in The Secret of the Old Clock, The Bungalow Mystery, The Mystery at Lilac Inn, The Secret at Shadow Ranch, Password to Larkspur Lane, The Message in the Hollow Oak, The Clue of the Tapping Heels, The Mystery of the Brass Bound Trunk, The Secret in the Old Attic, The Clue of the Leaning Chimney

Helen Corning / Helen Archer

Also in The Secret of the Old Clock, The Bungalow Mystery, The Mystery at Lilac Inn, Password to Larkspur Lane

Nathan Gomber

Rosemary Hayes

Floretta Turnbull

George Washington (Goodreads)

Also in The Mystery at Lilac Inn

Beethoven (Goodreads)

Willie Wharton

Dirk Jackson

Two brothers (The Hidden Staircase)

Everett Turnbull

Captain Rossland

Mr. Owl

Mr. Ritter

Albert Watson

Detective Tom Patrick

Miss Skade

Anthony Barradale

The man with the crinkly ear

Captain McGinnis

Dr. Morrison (The Hidden Staircase)

Mr. Dodd (The Hidden Staircase)