Mr. Gryce and Amelia Butterworth series

1. The Leavenworth Case 1906 (1878) (also subtitled: A Detective Story.) (transcription project)
2. A Strange Disappearance (1880) (external scan)
3. The Sword of Damocles: A Story of New York Life (1881)
4. Hand and Ring (1883) (external scan)
5. Behind Closed Doors (1888)
6. A Matter of Millions (1891)
7. The Doctor, His Wife, and the Clock (1895) novellette
8. That Affair Next Door (1897) [Amelia Butterworth 1]
9. Lost Man's Lane: a Second Episode in the Life of Amelia Butterworth (1898) [Amelia Butterworth 2]
10. The Circular Study (1900) [Amelia Butterworth 3]
11. One of my Sons (1901)
12. Initials Only (frontispiece, Arthur Keller) (1911)
13. The Mystery of the Hasty Arrow (1917) (external scan)

Other detective and mystery novels

• X Y Z: A Detective Story (1883)
• Hand and Ring (1883)
• The Mill Mystery (1886)
• 7 to 12: A Detective Story (1887)
• Behind Closed Doors (1888)
• Forsaken Inn (1890)
• A Matter of Millions (1891)
• Cynthia Wakeham's Money (1892)
• Miss Hurd: An Enigma (1894)
• Doctor Izard (1895)
• Agatha Webb (1899)
• One of my Sons (1901)
• The Filigree Ball: Being a Full and True Account of the Solution of the Mystery Concerning the Jeffrey-Moore Affair (1903)
• The Millionaire Baby (Illustrated by Arthur I. Keller) (1905) (external scan)
• The Chief Legatee' (1906) (external scan)
• The Woman in the Alcove (illustrated by Arthur I. Keller) (1906)
• The Mayor's Wife (Illustrated by Alice Barber Stephens) (1907)
• The House of the Whispering Pines (1910)
• Three Thousand Dollars (1910) (external scan)
• Initials Only (frontispiece by Arthur Keller) (1911)

• Dark Hollow (1914) (external scan)
• The Step on the Stair (1923)

Non detective novels

• The Sword of Damocles: A Story of New York Life (1881) (external scan)
• The Defence of the Bride, and other Poems (1882) (external scan)
• Risifi's Daughter, a Drama (1887)
• Marked "Personal", A Drama Within a Drama. (1893)
• To the Minute; Scarlet and Black: Two Tales of Life's Perplexities (1916)

Short stories and collections

• The Old Stone House and Other Stories (1891):
  • The Old Stone House
  • A Memorable Night
  • The Black Cross
  • A Mysterious Case
  • Shall He Wed Her
• A Difficult Problem and Other Stories
  • A Difficult Problem (1900)
  • The Grey Madam (1899)
  • The Bronze Hand (1897)
  • Midnight in Beauchamp Row (1895)
  • The Staircase at the Hearts delight (1894)
  • The Hermit of —— Street (1898)
• Masterpieces of Mystery (1913) (The stories were later collected again in "Room number 3, and "A Difficult problem")
• Room Number 3, and Other Detective Stories, 1913 ed. (1912)
  • Room Number 3
  • The Ruby and the Caldron
  • The Little Steel Coils
  • The Amethyst Box (c 1905) (external scan)
  • The House in the Mist
  • The Thief
• The Golden Slipper, and Other Problems for Violet Strange (1915): (external scan)

1. The Golden Slipper
2. The Second Bullet
3. An Intangible Clue
4. The Grotto Spectre
5. The Dreaming Lady
6. The House of Clocks
7. The Doctor, His Wife, and the Clock
8. Missing: Page Thirteen
9. Violet's Own