Hello. You did not present the text to which this question refers, which makes it impossible for it to be answered. In the meantime I will help you in the best possible way.
A textual evidence is a sentence that proves an affirmation presented in the text. This sentence justifies and shows that the statement presented is real and true.
It is only possible to point out the textual evidence of the physical and mental effects that Lyddie is facing, through reading the text, but we can consider that a hard work of a long journey would promote a great physical and mental fatigue in Lyddie, making her feel overloaded and even promoting symptoms such as pain, stress, discouragement and fatigue. In that case, you should find, in your text, evidence of these symptoms and the occurrence of these, or similar symptoms, in Lyddie.