# XIII explained — Blue Hand

> Chapter companion for Blue Hand by Edgar Wallace.

## What happens

Eunice learns from Jackson that a blue handprint was found on the laboratory door, signaling an intruder. Digby Groat appears haggard and suspicious. Later, at a reception, Lord Waltham comments on Mrs. Groat's decline, and Digby reflects on his mother's drug addiction and his control over her. Jim Steele consults his employer, Mr. Salter, about the blue hand and Mrs. Groat's will, then brings chocolates from Digby to an analyst, Mendhlesohn, who finds traces of bromide, hyacin, and cannabis indica.

## Themes in this chapter

### Deception and Manipulation

Digby Groat manipulates his mother's drug addiction to gain control over her, and Eunice prevaricates about her sleep to hide her involvement with Jim.

### Family Dysfunction and Secrets

The Groat household is rife with secrets: Mrs. Groat's hidden drug habit, Digby's exploitation of it, and the mysterious blue hand warning.

## Character check-ins

### Eunice Weldon

Learns of the blue handprint on the laboratory door; feels guilty and prevaricates about her sleep; continues her work in the household.

### Digby Groat

Appears tired and haggard; questions Eunice about the night's events; reflects on his mother's drug addiction and his control over her; attends Lord Waltham's reception.

### Jim Steele

Consults Mr. Salter about the blue hand and Mrs. Groat's will; brings chocolates to analyst Mendhlesohn for testing.

### Mr. Salter

Skeptical about the blue hand; discusses Mrs. Groat's will with Jim; dismisses the idea of poison.

### Jackson

Informs Eunice about the blue handprint; attempts to clean it; displays a sly and proprietorial attitude.

### Mrs. Groat

Mentioned as recovering; revealed to be a drug addict controlled by Digby.

## Key lines

> Mr. Groat will not be down to breakfast. He was working very late, miss.

Jackson informs Eunice that Digby is skipping breakfast due to late-night work.

_Sets the scene for the morning after the blue hand incident._

> Somebody was in the house, and it is a wonder that Mr. Groat didn't hear it, because he was working in his laboratory.

Jackson reveals that an intruder entered the house while Digby was in his lab.

_Highlights the intrusion and the blue handprint discovery._

> She was a drug-taker, as assiduous a 'dope' as he had ever met in his professional career. When he discovered this he had set himself to break down the habit. Not because he loved her, but because he was a scientist addicted to experiments.

Digby exploited his mother's drug addiction to gain control over her, motivated by scientific curiosity rather than love.

_Reveals Digby's manipulative nature and the family dysfunction._

> I found traces of bromide of potassium and traces of hyacin, and another drug which is distilled from cannabis indica.

The analyst discovered bromide, hyacin, and a cannabis derivative in the chocolates.

_Confirms Jim's suspicion that the chocolates are drugged._

## Links

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