I make a living poking around people’s homes.  As a residential architect in New England, I often find myself exploring antique attics, basements, and living spaces with a tape measure in tow.  I carry the same curiosity about houses into my personal life.  When I visit friends’ old houses, I’m not shy about tapping on a chase to hear if it’s hollow or peering into a fireplace to check out the firebox.  So, naturally, house tours suit my proclivities.  Especially the Christmas in Salem House Tour, which celebrates its 30th anniversary the first weekend of December 2009.  It’s always a treasure trove of intriguing historic properties.