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. But this man's face forced itself upon me, and a singular face it was. His eyes were faded, and his hair, which he wore long, was flecked with gray. His hair and eyes, if I may say so, were sixty years old, the rest of him not thirty. The youthfulness of his figure, the elasticity of his gait, and the venerable appearance of his head were incongruities that drew more than one pair of curious eyes towards him, He excited in me the painful suspicion that he had got either somebody else's head or somebody else's body.