Just a noise, that is all.But a very significant noise to Miss Nathalie Rogers, or Nattie, as she was usually abbreviated; a noise that caused her to lay aside her book, and jump up hastily, exclaiming, with a gesture of impatience: -"Somebody always 'calls' me in the middle of every entertaining chapter "For that noise, that little clatter, like, and yet too irregular to be the ticking of a clock, expressed to Nattie these four mystic letters: -"B m-X n;"which same four mystic letters, interpreted, meant that the name, or, to use the technical word, "call," of the telegraph office over which she was present sole presiding genius, was "B m," and that "B m" was wanted by another office on the wire, designated as "X n."A little, out-of-the-way, country office, some fifty miles down the line, was "X n," and, as Nattie signaled in reply to the "call" her readinessto receive any communications therefrom, she was conscious of holding in some slight contempt the possible abilities of the human portion of itsmachinery.For who but an operator very green in the profession would stay there?Consequently, she was quite unprepared for the velocity with which the telegraph alphabet of sounds in dots and dashes rattled over theinstrument, appropriately termed a "sounder," upon which messages are received, and found herself wholly unable to write down the words as fast as they cam