Julius P. Hersheimmer

The Secret Adversary

Arrives in London seeking help to find his missing cousin Jane Finn.

Mr. Julius P. Hersheimmer

The wealthy American cousin of Jane Finn, determined to find her; energetic and suspicious at first, then cooperative.

VI: A Plan of Campaign

Forms a close bond with Tommy and Tuppence after the Scotland Yard incident; they move into the Ritz at his expense.

VII: The House in Soho

Arrives at Waterloo just in time to follow Whittington to Bournemouth, at Tommy's request.

XI: Julius Tells a Story

Tells the story of following Whittington to Bournemouth, falling from a tree, and being treated by Dr. Hall.

A Friend in Need

Initially reluctant to involve Sir James, but agrees and offers a million dollars for information.

The Vigil

Participates in the vigil, searches the safe, and expresses frustration over past mistakes.

A Consultation

Proposes the elaborate plan to reenact the Lusitania sinking to restore Jane Finn's memory.

XV: Tuppence Receives a Proposal

Proposes to Tuppence, expresses discouragement about finding Jane Finn, and discusses Tommy's fate.

Annette

Mentioned in passing as part of the group; not directly present in this chapter.

The Telegram

Proposes to Tuppence and is refused. Takes decisive action to find her, eventually deciding to involve Scotland Yard. Receives news of Jane Finn's discovery.

XIX: Jane Finn

Eager to see Jane Finn; skeptical of Mr. Brown's existence; clashes with Sir James's authority.

XX: Too Late

Travels with Tommy; retrieves the packet from the crevice; admits his romantic feelings for Jane Finn have changed after meeting her in person.

Tommy Makes a Discovery

Argues with Tommy about Tuppence, recalls seeing Jane Finn in a nurse's uniform, and later leaves for Holyhead after the failed mission.

In Downing Street

Returns from Manchester to find a farewell letter from Tommy; he dismisses it as foolishness.

Julius Takes a Hand

Takes command, forces Kramenin to cooperate, rescues Jane and Tuppence from Gatehouse.

Mr. Brown

The real Julius Hersheimmer, presumed dead, returns with Tommy to apprehend Mr. Brown, revealing the impostor's plot.

XXVII: A Supper Party at the Savoy

Hosts the supper party and admits his earlier suspicion of Sir James; shows romantic interest in Jane.

XXVIII: And After

Julius proposes to Jane Finn in the Rolls-Royce, expressing his deep love and desire to care for her.