Page 102. " The rats here are particulary repulsive, they are so fat-the kind we all call corpse-rats "

Robert Graves wrote in Goodbye to All That:

Rats came up from the canal, fed on the plentiful corpses, and multiplied exceedingly. While I stayed here with the Welch, a new officer joined the company and, in token of welcome, was given a dug-out containing a spring-bed. When he turned in that night he heard a scuffling, shone his torch on the bed, and found two rats on his blanket tussling for the possession of a severed hand.

Page 103. " Next day there was an issue of Edamer cheese "
Edamer Cheese
Creative Commons Attribution Share AlikeEdamer Cheese - Credit: Yvwv

Edamer cheese is a Dutch cheese from the city of Edam in North Holland. It is known for its red wax coating

Edamer cheese travels well and is hard to spoil, so was a valuable food for soldiers in the trenches.

Page 104. " But the bayonet has practically lost its importance "
German soldier with bayonet
Public DomainGerman soldier with bayonet

The bayonet was used by all sides in World War I, although its value was more psychological than practical. Many World War I veterans stated that the bayonet was used primarily for toasting bread, opening cans, scraping mud off uniforms, or digging latrines. In the face of machine guns, grenades, and gas, bayonets were effectively obsolete.

Page 105. " But that interests us less than what we hear of the new flamethrowers. "

German Flamethrower on the Western Front During World War 1
Creative Commons Attribution Share AlikeGerman Flamethrower on the Western Front During World War 1 - Credit: Deutsches Bundesarchiv
The flamethrower was first used as a weapon by the Germans near Verdun in February 1915. The fire itself did not usually kill, but it flushed out enemy troops who could then be shot. However, the flamethrower was very heavy and awkward to use, and the soldier wielding it became a target for enemy attack.

Various nations used flamethrowers in World War II, including the United States. 

Page 112. " The helmets, they are French "

M15 Adrian Helmet
Creative Commons Attribution Share AlikeM15 Adrian Helmet - Credit: Rama
The M15 Adrian Helmet was issued to French troops in World War I. It was the first standard French helmet in any war.

Page 119. " Around the walls are the stone carvings of the Stations of the Cross "
12th Station of the Cross
GNU Free Documentation License12th Station of the Cross - Credit: Jesster79

The Stations of the Cross are images or statues representing the final hours of Jesus’ life on earth. Each depicts a particular event, starting with the condemnation to death and ending with the laying of the body in the tomb.