The Question and Answer section for The Secret River is a great resource to ask questions, find answers, and discuss the novel.
What chapter are you referring to?
The fact that William has got himself a stable job where the likes doing what he does for a living is a memorable time for william because :
1)He is now able to live with Sal all the time.
2)He is glad to have got a job as a waterman because...
Sorry, you will need to quote the passage for me as page numbers differ from publication to publication.