While I wandered the streets of Boston, a couple of letterbox jumped
out of my pocket. It couldn't be helped. But now you can find them,
if that's any consolation. =) The first box's clue is at
http://www.geocities.com/rscarpen/Lb/US/MA/Bunker

One other letterbox (VERY close to this one) will be coming soon in
case you want to wait for the other clue before heading out for this
box. Save yourself the extra trip. I should finish the other clue
within a week or so.

-- Ryan