The Secret of the Old Mill · Character

Sleuth

The Hardy boys' motorboat, used in their water-based investigations.

minor

Also known as the Sleuth

First appearance: The New Boat

Sleuth's tie to Frank Hardy is one of the pressures that moves The Secret of the Old Mill—worth meeting in the text, not only on a cast list.

The new motorboat, named Sleuth, is described as a graceful, powerful craft that wins a race against Tony's boat.

Free preview opens at this moment — character cards, Character Web, and themes sit beside the text as you read.

With Frank Hardy (friendship): Frank's dog and loyal companion, often aiding in tracking and clues. With Frank Hardy (friendship): Frank's…

Continue beside the text

The fuller portrait of Sleuth sits in Reading Lens — open the free preview to keep reading with notes on the page.

Character Web

9 connections

A slice of how Sleuth sits in the book — open the reader for the full interactive map.

Relationship types

Character groups

+4 more in the full Character Web

Story tension across the book — this chapter sits in Exposition.

This chapter marks the dramatic climax because it delivers the emotional and psychological peak of suspense: t…

Full beat labels and climax notes unlock in the reader.

Frank Hardy
friendship · positive
Frank's dog and loyal companion, often aiding in tracking and clues. How this plays out →
Frank Hardy
friendship · positive
Frank's dog and loyal companion, often aiding in tracking and clues. How this plays out →

Relationship notes

How these ties play out is in the reading companion — open the free preview.

Sleuth appears across 3 companion beats. Open any chapter in the free preview to see the notes beside the text.

Chapter companion notes

Spoil-light check-ins for Sleuth unlock in the free preview.