a trip thru lovely Concord to view the spring flood. 100+ scintillating photos, as proof. Thoreau quotes some authority that a 1/8 inch incline over a mile is enough to create a flow, and surmises that the Concord River's at right about that incline. a poky old river but in spring the river at least gets wide. a big change at the Bridge is the loss of trees. this area, and down the road--the so called Battle Road for the British coming from Charlestown to sniff out weapons caches of the fomenting revolutionaries--is National Park. and someone's wisdom was to return the area to how it looked then. that is: farmland: no trees. so down go the trees, even some old and lovely willows. sigh. Beth and I exchanged marriage vows on that bridge. as we arrived, a busload of teenagers arrived. looking at the spread of water from the bridge, a girl said, I didn't know lakes had currents.