# Dr. Thaddeus Jones — The Roman Hat Mystery character guide

> Dr. Thaddeus Jones in The Roman Hat Mystery by Ellery Queen.

**Role:** minor

**Also known as:** Dr. Jones, Professor Jones

**First appearance:** 0024-part-four-xix-in-which-inspector-queen-conducts-more-legal-conversations

## Who they are

Doctor who provides a medical opinion.

## In the story

### [Lexicon of Persons Connected with the Investigation](https://www.betterreads.dev/discover/the_roman_hat_mystery_se/chapters/lexicon-of-persons-connected-with-the-investigation)

Toxicologist of the City of New York.

### [Queen to Queen](https://www.betterreads.dev/discover/the_roman_hat_mystery_se/chapters/part-two-xiii-queen-to-queen)

Eminent toxicologist; reveals the poison found in Field's body was a startling discovery.

## Links

- HTML: https://www.betterreads.dev/discover/the_roman_hat_mystery_se/characters/thaddeus_jones
- Book: https://www.betterreads.dev/discover/the_roman_hat_mystery_se
- All characters: https://www.betterreads.dev/discover/the_roman_hat_mystery_se/characters