Final answer:
The word 'corralled' in the sentence means that Amelia gathered Lyddie and Prudence together for a walk.
Step-by-step explanation:
The context clue for the word 'corralled' in the sentence 'On Saturday evenings they were let out two hours early and Ameliacorralled Lyddie and prudence for long walks along the river before it grow too dark' suggests that Ameliacaptured or gathered Lyddie and Prudence for a walk. The word 'corralled' is often used in relation to rounding up or confining animals in a corral, which is an enclosed area for livestock. In this case, it means that Amelia gathered Lyddie and Prudence together for a walk.