BTW, there seems no reason for disparaging the Brewerton culture of projectile points.

To any amateur, they look like the standard arrow-head points. Some artisans were better, some poorer in making things, like now. Paleolithic peoples many times re-discovered the notch, but the really vital matter was how a point was attached to the shaft. Glues, twisted vines, recover the hard-won point to re-use. Hunters were less interested in aesthetics in favor of how it penetrated/killed and could be recovered from a missed shot.

http://www.lithicsnet.com/brewetonsidenotched.html
http://www.lithicsnet.com/brewertonearednotched.htm

Even in Irelandish and Gaelic, between "him and I" is bad aspoke. Gaelic grammar mostly copies Latin grammar. Go thou and do likewise.