Two blocks of Arch Street, 1400 and 1500, joined forces this Sunday to hold a marathon garage sale, dotting both sides of both blocks. The motive, beside shedding stuff, was to help neighbors meet neighbors. It worked - I met several new people. Doing it all at once seemed to attract more foot traffic, too. There's an archeological quality to garage sales, exposing layers of the past. They're also anthropologically interesting, as slices of material life come into view. The act of shedding reflects different impulses - from paring back to moving on. In the New Jersey town where I grew up, an annual church sale was the prompt. This two-block event had something of that spirit.