On an overcast day in May, we walked down a quiet London street. A row of laburnum trees lined the sidewalk. Long chains of blossoms exactly the color of lemon peels swung delicately in the breeze. What a dramatic contrast to the almost-black branches! I had never seen a laburnum in person. To be surrounded by such an exuberance of yellow was almost more than I could absorb. We stood there and looked and tried to take in the wonder of it. Ever since that day, this is what comes into my head when I think of yellow.