The Problem of the Vanishing man –––––––– There was a feverish restlessness in the merciless gray eyes, an unpleasant frown on his brow, as Charles Duer Carroll paused on the curb in front of a tall down town office building and stared moodily across the busy street into nothingness. Carroll was a remarkable looking young man in many ways. He was young — only thirty — and physically every line of his body expressed power, sturdiness rather than youth, force rather than grace. He was blessed too with an indomitable, uncompromising jaw, the jaw of a fighting man. The chin was square, the lips thin, avaricious perhaps, the nose slightly hooked, the cheek bones high. In general his appearance was that of a keenly alert man who is never surprised; who chooses his way and pursues it aggressive