I found a referece to Gamblin End in the previous street listing book, so I took a chance and Google'd it. Sure enough, I found this reference in another online book, Suffolk Deeds By Suffolk County (Mass.) 1896, by John Tyler Hassam. Remarkably, it's a will written for Wiliam Curtis (as in the Curtis Hall family) in 1669. With enough of these, a loose map could be produced of present day Jamaica Plain in colonial times.
The type below is in the form of graphics, so it can be seen in larger versions if necessary. Click on the text to expand the view.