Historians of Technology have failed to include the larger contribution and influence of Ctesibius’ compressor-driven Hydraulis with its pneumatic pumps, keyboard, and organ pipes in the path of critical preparatory events leading up to the ‘Latent’ Industrial Revolution. One should also realize that Ctesibius had all the parts and sub-assemblies on hand to invent the first Steam Hydraulis or Calliope, as illustrated on the front book cover of this work. From the 'Fertile Crescent' of the Persian Empire to the Hellenistic Library of Alexandria, Vitruvius writing brought the Hydraulis to the Abbey of St. Gall in 1414 during the Renaissance. Its path then took it through Italy, Germany, and the Paris of Louis XIV along the Arch of Industrial Reawakening. This was the Hydraulis 2-millennium path from Antiquity to its return reigniting the 'Latent' Industrial Revolution.