A mix of clouds and sun early followed by cloudy skies this afternoon. High 59F. Winds light and variable.. Considerable cloudiness. Occasional rain showers after midnight. Low 43F. Winds light and variable. Chance of rain 50%. Angus Macdonald, shown here outside his home in Rapidan, first got interested in architecture when he was a little boy building sandcastles on the beach.  Angus Macdonald combines the visionary and the practical in his work as an architect concerned with reducing the carbon footprint of building and maintaining houses and other properties.  Angus Macdonald, shown here outside his home in Rapidan, first got interested in architecture when he was a little boy building sandcastles on the beach.  Angus Macdonald combines the visionary and the practical in his work as an architect concerned with reducing the carbon footprint of building and maintaining houses and other properties.  Tucked away in the hills of Rapidan is a snug little house with astonishingly thick, earthen walls, designed in 1935 by a mid-20th century architect named Angus Snead Macdonald. Inside the house, on a misty morning in late fall, sat his grandson, Angus Wyman Macdonald, also an archi...