Upon entering Narnia for the first time, Jill meets Aslan while she is refreshing herself at a stream. Since she had pushed Eustace off the cliff in fear of falling herself, she is given a task by Aslan for Eustace and she to complete. The quest was be guided by Aslan who gave Jill the following four steps in which they must proceed.
“These are the signs by which I will guide you in your quest. First; as soon as the boy Eustace sets foot in Narnia, he will meet an old and dear friend. He must greet the friend at once; if he does, you will both have good help. Second; you must journey out of Narnia to the north till you come to a ruined city of the ancient giants. Third; you shall find writing on a stone in that ruined city, and you must do what the writing tells you. Forth; you will know the lost prince( if you find him) by this, that he will be the first person you have met in your travels who will ask you to do something in my name, in the name of Aslan.”
The Silver Chair, Jill’s is Given a Task, The Chronicles of Narnia.
If it had not been for some quick acting on the parts of Jill, Eustace, and Puddleglum, the trio would had failed to achieve the task set before them by Aslan. They had missed opportunities with the first three signs and had suffered many hardships and delays because of their obstinacy. This was more so with the children than Puddleglum.