Quarter day had come at Pop's,--a day marked in the annals of the school and celebrated in its traditions. More stories centred on that momentous date than on all the other school-days combined. On the Friday of the last week of the expiring quarter each of the Doctor's pupils would be handed an envelope addressed to his responsible parent or guardian, and each envelope so addressed contained the school bill for the ensuing quarter, filled out in the Doctor's unique and dainty hand. No writing was ever like it. Pop had a system of penmanship, as he had of punishment, of instruction, and school discipline, peculiarly his own. His capital letters were always large, clear, and well formed. His small letters, except those extending above and below the line, were indicated by tiny, back-handed dashes that individually conveyed no idea and collectively were unmistakable. Not a word of instruction accompanied the presentation of the missive, but every boy knew infallibly what to expect. From time immemorial in the history of the school the unwritten law had been that every boy appearing with the cash or check in payment of the bill early on the following Monday morning might go his way on whole holiday. If the money came on Tuesday the bearer was released at twelve o'clock; but if it failed to come on Wednesday the pupil found himself drifting from one scrape into another until it did come, and old boys used to declare that pretexts were never lacking, when they were of the school, to warrant the Doctor in flogging, every day until the money came, the hapless lad whose parents failed to meet the demand on time. Small wonder that Pop's boys developed phenomenal powers as bill collectors and that Pop himself had no dunning letters to write.