I think Timothy Lean appears more "calm and collected" than the adjutant. Though he did not like doing things he had to do, he performed them well. He searched the corpse to look for his things. He lifted the body, with the help of the adjutant, and laid it on the grave. He said a little prayer over the grave. He continued covering the grave with dirt after the private got shot. He covered the upturned face with earth to completely bury the dead.
It's not likely you'll overdose on nicotine just from smoking cigarettes. Your body absorbs the nicotine in a cigarette around 1 milligram when you smoke it. Overdosing from nicotine gum or a patch is rare but it's possible if you don't follow the instructions carefully.
