One morning as I was passing through Boston Common, which lies between my home and my office, I met a gentleman lounging along The Mall. I am generally preoccupied when walking, and often thread my wa...

One morning as I was passing through Boston Common, which lies between my home and my office, I met a gentleman lounging along The Mall. I am generally preoccupied when walking, and often thread my way through crowded streets without distinctly observing any one.