Has been over 20 years since I've been there, but am from S. NH and on RT 31 South (south off of RT 101), about a couple miles before Greenville NH on the right is an old Railroad trestle 80 feet high maybe (again been a long time) totally bolted up and also great cracks everywhere for nuts/cams , is where I learned aid climbing before I did the prow on cathedral with the guy who taught me there, was great A/0 or harder depending on what you used and I believe had nice chain anchors at the top.
So headed south on 31 before , river (souhegan?, cant remember for sure) runs parallel with road, on right side, look for old trestle RR bridge and is first one right by river, has a bolted front face and can do harder climbs on at least one of the sides, as I recall you had to take a left up a side road right before or after the trestle to park, could not park right on highway on right side, if you get to right to greenville nh, you have gone too far.
So I know a bit vague, and of course no idea what shape bolts might be in 25 years later, but I know it was known as the aid-practice place for S. NH back in the day, am sure Base climbed there, Mr. Strand knows of maybe?, anyway should be able to find it , as it is right there by river, right befor greenville, best of luck and if you do end up going there, let me know what shape it is in and what you thought, I had a blast there couple times I went and was great intro to aid climbing
