**Character Sketch of Ausable:**

Ausable is a central character in the story "The Midnight Visitor" by Robert Arthur. He is a professional writer and a master of disguise who is approached by a mysterious man named Mr. Smith to write a murder confession on his behalf. Ausable's character is portrayed as intelligent, resourceful, and observant throughout the story.

**Intelligence and Resourcefulness:**
Ausable is depicted as an intelligent and resourceful character. He is quick-witted and able to think on his feet, which is evident in his ability to come up with a plan to solve the mystery surrounding Mr. Smith's request. He uses his writing skills and knowledge of crime to create a believable confession, ensuring that it is convincing enough to deceive the police.

**Master of Disguise:**
One of Ausable's notable traits is his exceptional talent for disguise. He is skilled at transforming his appearance to blend into various roles, whether it be a beggar or a police officer. This skill proves to be valuable as he uses it to gather information and navigate through different situations without raising suspicion.

**Observant and Detail-oriented:**
Ausable possesses a keen eye for detail and is highly observant. He carefully observes his surroundings, people's behavior, and their interactions, allowing him to gather crucial information and make accurate deductions. This attention to detail helps him in solving the mystery and unraveling the truth behind Mr. Smith's request.

**Calm and Composed:**
Throughout the story, Ausable remains calm and composed, even in challenging situations. He maintains his cool demeanor, which enables him to think clearly and make rational decisions. This trait also earns him the trust of those he encounters during his investigation, as they perceive him as a reliable and level-headed individual.

**Conclusion:**
Ausable is a well-developed character in "The Midnight Visitor" who possesses a combination of intelligence, resourcefulness, and observant nature. His mastery in disguise, attention to detail, and composed demeanor enable him to navigate through the mystery and successfully accomplish his mission.