# The Track Chart explained — The Mystery of 31, New Inn

> Chapter companion for The Mystery of 31, New Inn by R. Austin Freeman.

## What happens

Thorndyke and Jervis return to Thorndyke's chambers, where Jervis provides a detailed account of his earlier experiences with the mysterious patient and the closed carriage. Thorndyke then plots Jervis's compass bearings onto a chart, using proportional measurements and an ordnance map to locate the house of Mr. Weiss. They conclude that the house is on the south side of Upper Kennington Lane and plan to verify their findings with a visit to the spot, after which they may consult Scotland Yard or investigate further themselves.

## Themes in this chapter

### Scientific Method and Forensic Investigation

Thorndyke applies systematic plotting, proportional measurements, and ordnance map comparison to locate the house, demonstrating rigorous forensic methodology.

### Deception and Concealment

Weiss's use of a blinded carriage and persistent conspiracy to murder Graves highlights deliberate deception and concealment of criminal activity.

### Friendship and Loyalty

Thorndyke offers Jervis a permanent residence in his chambers, and Jervis eagerly assists in the investigation, reflecting mutual loyalty and camaraderie.

## Character check-ins

### John Thorndyke

Thorndyke listens to Jervis's detailed narrative, plots the track chart, and deduces the location of Weiss's house using scientific methods.

### Dr. Jervis

Jervis recounts his earlier experiences in detail, provides the compass-bearing notes, and assists Thorndyke in plotting the chart.

### Polton

Polton is mentioned as having prepared Jervis's bedroom and is expected to collect the lamp.

### H. Weiss

Weiss is discussed as the cunning and persistent conspirator who used a closed carriage and likely murdered Mr. Graves.

### Mr. Graves

Graves is the presumed victim of the conspiracy, with Thorndyke concluding that the probability of him being alive is infinitesimal.

### Mr. Superintendent Miller

Miller is mentioned as a contact at Scotland Yard whom Thorndyke may consult after locating Weiss's house.

## Key lines

> I entirely agree with your police officer. Nor do I fancy that some of my acquaintances at Scotland Yard would have agreed with him.

Thorndyke says he agrees with the police officer's assessment, but suspects that his contacts at Scotland Yard might disagree.

_Thorndyke expresses nuanced agreement with the police officer's view, hinting at deeper professional insight._

> The probability that Mr. Graves is alive at this moment seems to me infinitesimal. There was evidently a conspiracy to murder him, and the deliberate, persistent manner in which that object was being pursued points to a very strong and definite motive.

Thorndyke believes Mr. Graves is almost certainly dead, given the clear and persistent conspiracy to kill him, which suggests a powerful motive.

_Thorndyke articulates his conclusion that Graves has been murdered, based on the calculated nature of the plot._

> Don't be sketchy, Jervis. To be sketchy is to be vague. Detail, my child, detail is the soul of induction. Let us have all the facts. We can sort them out afterwards.

Thorndyke insists that Jervis provide a full, detailed account rather than a summary, because details are essential for logical reasoning.

_Thorndyke emphasizes the importance of thorough detail in forensic analysis._

> I think we have narrowed down the locality of Mr. Weiss's house to a few yards in a known street.

Thorndyke concludes that they have pinpointed the location of Weiss's house to within a small area on a specific street.

_Thorndyke's chart plotting has successfully reduced the search area for Weiss's house._

## Links

- HTML: https://www.betterreads.online/discover/the_mystery_of_31_new_inn_se/chapters/viii-the-track-chart
- Book: https://www.betterreads.online/discover/the_mystery_of_31_new_inn_se
- All chapters: https://www.betterreads.online/discover/the_mystery_of_31_new_inn_se/chapters