pinelandpaddler
You are reading it correctly, I know there was a herring factory down that way but I can not remember the actual location.
Josiah Foster was Indian Commissioner, he surveyed the reservation, cutting it into 100Ac lots, when they sold them he got the two prime lots which contained the Sawmill and the high ground where the indian village was location. And, I think he re-sold shortly after for good profit.
The only Sleepy Creek I know is where you are pointing but this Sleepy mill is in Washington Twp, Burlington County which is north of the river.
Don