The "Manuscript of the Hussite Wars' Engineer" is frequently cited, but never studied in full. It is a compendium of drawings ans descriptions concerning military devices, various construction machines and mills. It is usually thought to depicz the state of technology in Germany about 1430. Bert S. Hall's treatement ofthis document ist the first complete, modern edition to appear, but it is prefaced by an extensive study of the work in relation to tis 15th century-milieu. This allows many misunderstandings to be corrected and our view of the manuscript to be entirely revised.