Sergeant Dick of the Royal Mounted Police

The Story

Sergeant John Dick of the Royal Canadian Mounted Police is patrolling a rugged, mountainous region near the United States border when he discovers two young women, Muriel and Jenny Arnold, in a buggy. They invite him to visit their home, which they call “Water Castle,” a structure built on piles far out in a remote lake. This fortress is the invention of Muriel’s uncle, Alf Arnold, a squatter who has fortified his home with loopholes and heavy doors, inspired by the defensive architecture found in the novels of Fenimore Cooper. Upon his arrival, Sergeant Dick is introduced to the rest of the Arnold family, a resilient group of settlers who have turned this lake into their own private refuge against the dangers of the wilderness.

The peaceful atmosphere is quickly shattered when a group of hostile Indians, led by a man named Howling Wolf, descends upon the lake. The family is forced to retreat into their floating castle and an attached vessel they call the "ark." The conflict escalates into a series of sieges. Using the lake’s natural acoustics—which amplify sounds and create deceptive echoes—the family manages to fend off initial attacks. Sergeant Dick, despite his official duty to attempt peaceful negotiation, finds himself compelled to take up arms to protect the household. The conflict is brutal and fast-paced, involving nighttime skirmishes, the burning of the family’s stable, and the constant threat of the attackers scaling the pillars of the house.

As the battle progresses, the family is separated. The men are captured by the Indians, and the women, left behind in the castle, must hold their ground. Sergeant Dick proves himself a capable strategist, using both his rifle and his automatic pistol to hold off boarding parties. Through a mix of ingenuity—such as using an anchor rope to pull their floating boat back to safety—and the sheer tenacity of the defenders, they survive the initial waves of the Indian war party. However, the danger does not dissipate when the Indians are finally repelled. A more sinister threat emerges: a mysterious group known as the "White Hoods."

These masked outlaws, who ride the mountain ridges and possess stolen cattle brands, turn out to be the true architects of the region's chaos. Sergeant Dick discovers their hidden base, a hut connected to a cave system, and realizes that the Arnold family itself is deeply embroiled in these criminal activities. It is revealed that the Arnolds—the very people who hosted the sergeant—are the leaders of the White Hoods, using their "Water Castle" as a base to orchestrate cattle rustling and violent retribution. The final act of the book involves a confrontation between the authorities and the family, leading to a tense standoff at the lake. The inspector arrives to take the outlaws into custody, but the Arnolds, true to their defensive nature, refuse to surrender. The story concludes with the final collapse of the White Hoods, leaving the sergeant to reconcile his duty to the law with the complex, often duplicitous nature of the people he encountered in the woods.

The People

• Sergeant John Dick: A member of the Royal Canadian Mounted Police who values order and duty. He begins the book as a helpful protector of the Arnold family but is forced to undergo a painful shift in perspective when he realizes he has been aiding and living among the very criminals he is sworn to apprehend.
• Alf Arnold: The patriarch of the Arnold family and the architect of "Water Castle." He is a cunning, resourceful, and deeply dishonest man who models his life after fictional characters to justify his isolationist and criminal lifestyle. He views his family as a unit that must fight the world to survive.
• Muriel Arnold: Alf’s niece, who initially presents herself as a refined, innocent young woman. She is instrumental in the family’s defense and is a master of using the lake’s environment to her advantage. She remains a character of divided loyalties, caught between her devotion to her kin and the realities of their crimes.
• Aunt Kate: The matriarch of the family, characterized by a fierce, lion-like personality. She is the backbone of the resistance within the castle, often outshining the men in her willingness to engage in combat and her refusal to capitulate to the authorities.
• The White Hoods: A gang of outlaws who terrorize the region. Though they appear as spectral, hooded figures to intimidate others, they are ultimately unmasked as the Arnold family and their associates, representing the blurred line between the rugged independence of the frontier and lawless banditry.

In Its Own Voice

While scouting the mountainside, the sergeant considers the tactical advantages of the outlaws' secret base and his own precarious position.

“I couldn’t possibly hope to tackle so many at once. I’ll go back the way I came, and try in some way to communicate with the Arnolds again.”

After being captured by the mysterious band of outlaws near their secret valley, the sergeant and the squatters are forced to reveal their identities to the group's leader.

“In their ghostly disguise the fellows did not look human.”

When the law finally catches up to the Arnolds at their lakeside home, the family refuses to give up their freedom without a final struggle.

“Curse you, we will fight to the death!”

What It's Really About

The book explores the tension between the myth of the rugged pioneer and the reality of criminal survivalism. The Arnolds are not merely settlers; they are refugees from civilization who believe their isolation in the mountains entitles them to live by their own rules. By explicitly basing their home and tactics on the literature of James Fenimore Cooper, they demonstrate how stories can be used to construct a false identity. Alf Arnold does not just live in the woods; he performs the role of the frontier hero, using the "Water Castle" as a stage to justify his theft and violence as a "defensive" necessity.

There is a profound irony in the book’s central conflict: the sergeant is a literal representative of the Law, yet he is manipulated into acting as an accomplice to the Arnolds' "private" war. The story interrogates the idea of loyalty in a lawless space. For the Arnolds, family loyalty is absolute, superseding any broader social contract or moral code. The "White Hoods" serve as a manifestation of this exclusivity; they use anonymity and terror to protect their own interests against both indigenous people and the encroaching state.

The book also deals with the concept of "The Lake of the Wonderful Echo," which serves as a metaphor for the book's narrative structure. Just as sound is distorted and repeated by the mountains, the truth in this story is constantly shifting. Motivations are layered: the Indians attack for their own reasons, the police investigate out of duty, and the Arnolds fight to preserve their secret crimes. The echo serves as a reminder that in this remote region, actions have long-lasting, often distorted consequences that return to haunt the perpetrator. Ultimately, the book asks whether a life of total autonomy is possible without descending into moral corruption. The answer provided is a stark one: the very defenses that keep the world out—the walls, the moats, and the masks—inevitably trap the inhabitants within, turning them into prisoners of their own making. It is a story about the inevitable collision between the fantasy of self-governance and the reality of the law.

Why Read It Today

Readers who enjoy early twentieth-century adventure fiction will appreciate the brisk pacing and the atmospheric setting of the Canadian wilderness. The book feels like a blend of a classic Western and a home-invasion thriller, where the geography of the lake is just as important as the characters themselves. The descriptions of "Water Castle"—with its trapdoors, secret chutes, and reinforced shutters—provide a tactile sense of danger and mechanical ingenuity that is very satisfying.

However, modern readers should be prepared for the period-typical depictions of the characters and their motives. The dialect used by the Arnold family is heavily stylized and sometimes difficult to parse, reflecting a specific, dated attempt to capture "frontier" speech. Furthermore, the attitudes toward the indigenous characters reflect the prejudices of the 1929 publication era, and the narrative centers exclusively on the perspectives of the white settlers, treating the indigenous presence primarily as a hostile, monolithic force to be overcome.

Despite these aspects, the book remains a compelling curiosity for those interested in the evolution of juvenile adventure fiction. It is less a "classic" in the traditional sense and more a quintessential artifact of the "boys' own" adventure genre, where action is paramount and morality is often framed through the lens of rugged survival. You will likely walk away from the book thinking about the "White Hoods" and the strange, claustrophobic life of the Arnold family. It is a story that stays with you not because of its nuance, but because of its singular focus on the mechanics of a fight and the relentless, almost obsessive nature of the Arnolds' defense. If you enjoy stories where the setting functions as a character and the plot never stops moving, you will find it an engaging, if occasionally jarring, look at how authors of the period imagined the wilder corners of the North American map.