Scenes from a morning run…In Cambridge this weekend for the Third Annual Construction History Conference, a European gathering that’s been hosted by Queens College here each year.  Queens is becoming something of a sacred ground in CH, having hosted the triennial Congress in 2006 that was an important gathering for many of us, and it’s always provided a warm welcome as CHS has begun annual meetings here.  I’m giving a keynote on Chicago tomorrow afternoon, in the meantime today’s agenda includes medieval brick staircases, post-tensioned floors in the 20th century, Roman building techniques, 19th century South American plumbing, and late gothic vaulting, among others.  Feeling a bit like a kid heading into a LEGO store, further reports as conditions warrant…