Absent-mindedly

Professor Archimedes Q. Porter, his hands clasped beneath the tails of his long coat, paces back and forth under the ever-watchful eye of his faithful secretary, Mr. Samuel T. Philander. Twice within the past few minutes he has started absent-mindedly across the tracks in the direction of a near-by swamp, only to be rescued and dragged back by the tireless Mr. Philander.