Final answer:
The physical transformation of Jean Valjean in the last hour in the courtroom is not explicitly detailed in the text. Inferences from other characters suggest dramatic changes due to stress, such as paleness and a haunted look.
Step-by-step explanation:
The physical transformation of Jean Valjean during his last hour in the courtroom is not explicitly detailed in the provided text, which seems to be a mix of different stories. However, one can infer that individuals facing a trial or a dire situation—as Jean Valjean might have been—could experience significant physical changes due to stress and anxiety. Such changes could include paleness, weight loss, or a haunted look in their eyes resulting from the emotional turmoil of their predicament.
Instead, the provided texts discuss the impact of trials on other characters, detailing their physical and emotional responses. For instance, a character with a bleeding at the lungs is described as 'white, sick-looking' and another shows a demarcation on the skin where the sun has not touched.