Allegory in 'the Outsider'

There are few flourishes of figurative language in The Outsider. We need to consider any appearance of elaborate language in detail.

Salamano's dog
Consider the context: the extermination camps of the Nazi regime were home to those in the realm considered to be 'outsiders', Jews, Homosexuals, Political opponents. They were to be purged from society.
Salamano fears 'the police will pick him up for sure'. He supposedly 'disgusts everyone with his scabs'. The dog is a metaphor for the fate of those thought to be an 'other' figure by authority.
Camus wrote for the resistance magazine 'Combat'. An underground magazine, writing in opposition to the regime. The French Government of the time, the Vichy Government, was considered to be a puppet government. The 'jack boot' for the Nazi Regime. Think about the figure of Meursault. He was uncompromising and loyal to his ideals to the end, even his end. The Vichy Government in contrast compromised own position in the war as to appease the Nazis. Camus satires this.

The Newspaper article
The story is about a poor young man living in a Czech village, he leaves, making his fortune, and then decides to return home. Displaying his trappings of wealth, his family fail to recognise him. Having not revealed his identity he stays the night in a local hotel. His family, still poor, sneak into his room, rob and murder him.
Meursault thinks the story is both 'improbable' and 'plausible'. While Camus was a persistent humanist, he was also very aware of death and 'tender indifference of the world', having nearly died from tuberculosis in his youth. This story is plausible to him because he is acutely aware of the cold indifference of the world. Think about Camus absurdist beliefs. The world is chaotic, without order or pattern.
He believes the man 'deserved what he got'... that one 'should never joke around like that'. This relates to Camus' in belief maintaining one's integrity. A love for a sun 'that leaves no shadows'. One should be honest, live ones life in black and white so to speak.

The Wall
Camus' impassioned argument with the chaplain marks another use of allegory. The chaplain says 'I'm asking you to see.' He wants Meursault to discern some pattern in the stones of the wall, to see a 'divine face'.
This command to see a pattern in the stones is allegory, an allegory that acts as a vehicle for his absurdist philosophy. Meursault rejects his assertion that there is a pattern in the stones, that is, that there is a pattern or higher meaning to the world. He undermines the authority of the chaplain. He undermines mankind's perpetual attempts to 'rationalise an irrational world'.
Context:
"Camus’ contempt for the state is evident in this quote and it is no surprise that he would become an anarchist at heart, viewing all power structures as inherently corrupt and self-serving. He said:

Note, besides, that it is no more immoral to directly rob citizens than to slip indirect taxes into the price of goods that they cannot do without.^11 "