The mystery of Newstead Montegrade

The site that sells USGS topo maps includes this warning:

The "Possible Features on the Map" list is provided as an indication of the area covered. The features shown on this list are located within the area shown on this map, but we cannot guarantee that they will be labeled on the map itself. The features come from a separate USGS database, and we have not compared them with the actual map. We list these features only as supplemental information that might help you locate the best map.
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When the features list mentions a school, cemetery, mine, city park, cave or other small feature, a symbol is probably shown on the map but not necessarily the name. Rivers, creeks and other water features are always shown and are usually labeled (but not always).

I don't have a printed copy of the very latest USGS map, but I do have a Rubel's Boston Bikemap which is based on USGS. It does not show Newstead Montegrade.

Topozone.com has heard of Newstead Montegrade, with latitude 42.311ºN, 71.096ºW, elevation 150 feet.
But the resulting map doesn't show it marked, not even if you zoom in. It does not appear to be a hilltop.

If we do take a field trip looking for this, I recommend bringing along a GPS.

I've not yet gotten a reply from the guy who owns newsteadmontegrade.com. I wonder if my voicemail weirded him out.

I think I'm going to go get an account on Newstead Montegrade Adult Chat this weekend though. I mean, how much more fun can you get, having X-rated chat about Massachusetts' big little city?