'''Augustus S. F. X. Van Dusen''', often referred to as "'''The Thinking Machine'''", is an eccentric and intellectually formidable American scientist and researcher, known for his exceptional deductive reasoning abilities and his unshakeable confidence in his own mental prowess. He is often on occasion contacted with requests to solve what are considered to be unsolvable crimes with his friend and companion, Hutchinson Hatch, reporter for the fictional Daily New Yorker.

Physically, Van Dusen is described as tall and thin man of German descent, with a high domed forehead housing his immense intellect, topped with bushy blonde hair. Behind his thick spectacles, his sharp, squinted blue eyes are constantly analyzing the world around him, while his thin lips betray little emotion. He carries himself with an air of intellectual superiority, often appearing aloof or detached from the concerns of ordinary people.

Van Dusen's personality is characterized by his intense focus on logic and reason. Having spent 35 years proving that two and two always equal four (except in unusual cases), he believes all things that start must go somewhere. He approaches every problem with a scientific mindset, relying solely on his intellect to unravel even the most complex mysteries. His mind operates with clockwork precision, dissecting clues and drawing conclusions with astonishing speed and accuracy. He is not one to rely on intuition or emotion, preferring instead to trust in the power of pure logic.

Despite his brilliance, Van Dusen's personality can come across as cold and impersonal, viewing human emotions as irrelevant distractions from the pursuit of truth. His dedication to solving puzzles can make him appear aloof or arrogant. However, beneath his icy exterior lies a deep-seated passion for intellectual challenge. He thrives on solving seemingly impossible problems, pitting his mind against perplexing mysteries. His love for intellectual stimulation drives him to seek new challenges, whether in criminal investigations or academic puzzles.

Van Dusen's reputation as a master of deduction precedes him, earning him both admiration and disdain from those in the academic and law enforcement communities. Some view him as a genius whose insights are unmatched, while others see him as an insufferable egotist.

*The Problem of Cell 13 (1905)
*The Ralston Bank Burglary (1905)
*The Flaming Phantom (1905)
*The Great Auto Mystery (1905)
*Kidnapped Baby Blake, Millionaire (1905)
*The Mystery of a Studio (1905)
*The Scarlet Thread (1905)
*The Man Who Was Lost (1905)
*The Golden Dagger (1905)
*The Fatal Cipher (1906)
*The Mystery of the Grip of Death (1906)
*Problem of Dressing Room 'A.' (1906)
*Problem of the Motor Boat (1906)
*A Piece of String (1906)
*Problem of the Crystal Gazer (1906)
*Problem of the Roswell Tiara (1906)
*Problem of the Lost Radium (1906)
*The Problem of the Opera Box (1906)
*Problem of the Missing Necklace (1906)
*Problem of the Green Eyed Monster (1906)
*Problem of the Perfect Alibi (1906)
*Problem of the Phantom Auto (1906)
*The Haunted Bell (1906)
*Problem of the Stolen Bank Notes. (1906)
*Problem of the Superfluous Finger (1906)
*Problem of the Knotted Cord (1907)
*Problem of the Souvenir Cards (1907)
*Problem of the Stolen Rubens (1907)
*Problem of the Three Overcoats (1907)
*Problem of the Organ Grinder (1907)
*Problem of the Hidden Million (1907)
*Problem of the Auto Cab (1907)
*Problem of the Private Compartment (1907)
*Problem of the Cross Mark (1907)
*Problem of the Ghost Woman (1907)
*The Silver Box (1907)
*Problem of Convict No. 97 (1907)
*Problem of the Deserted House (1907)
*Problem of the Red Rose (1907)
*Problem of The Vanishing Man (1907)
*Problem of the Broken Bracelet (1907)
*Problem of the Interrupted Wireless (1907)
*The Grinning God: Part 1: Wraiths of the Storm (1907)
*The Grinning God: Part 2: The House That Was (1907)
*The Mystery of Prince Otto (aka Five Millions by Wireless) (1912)
*The Tragedy of the Life Raft (1912)
*The Case of the Scientific Murderer (1912)
*The Jackdaw (aka The Jackdaw Girl) (1912)

*[https://en.wikipedia.org/wiki/Augustus_S._F._X._Van_Dusen Wikipedia]
*[https://comicvine.gamespot.com/augustus-van-dusen/4005-103441/ ComicVine]

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