Five Weeks in a Balloon (Cinq semaines en ballon)

173 x 120 mm), 354 pp., with the subtitle "Voyage de découvertes en Afrique par trois Anglais, rédigé sur les notes du docteur Fergusson" — the wording "rédigé sur" is a point, later editions reading "rédigé d'après." First-issue points: the title page bears the initials "J H" at centre and does NOT carry "Seconde édition"; and pages 247, 317, 337 and 342 are misnumbered 47, 17, 37 and 42 — these pagination errors were corrected in the second edition and are the sharpest internal test