Ralph Waldo Emerson and Henry David Thoreau met in 1837.  Lucy Brown, who boarded at David Thoreau’s home, was the sister-in-law of Ralph Waldo Emerson. On April 9th, she introduced the two men who were destined to form a lifelong friendship.  Emerson was 34 and Thoreau was a 20-year old Harvard senior.  Both men were…