The author probably relied mostly on notes he had kept while on crusade. The final work, however, is a coherent and well-crafted history, not a diary. Tessier and Kandel took it to be an official work, but this is not widely accepted. To Andrea, there is no evidence that the author was close to any of the crusade leaders or their private councils. The
Devastatio has been compared to a
single-entry account book. The author pays special attention to numbers such as prices and payments and also keeps track of the size of the army by counting fatalities, casualties, leaves and desertions. The number of ships in the Venetian fleet and the number of
siege engines is also tracked. These statistics are generally accurate, especially when based on first-hand observation, but they are occasionally infected by "camp rumour". The author also shows great interest in contracts, oaths, pledges and treaties, a series of eight of which structures the entire narrative. The first contracts are the crusading vows and the pledges made by surrogates to go in place of those crusaders who died before setting out. The compact made by the cities of
Lombardy to hurry the armed contingents on their way to the rendezvous in Venice is presented as the first counter-crusade action. The next major contracts are the oath of allegiance taken by the barons to Boniface (who is referred to throughout simply as the Marquis) and the agreement with Venice, which results in the
Siege of Zara. At Zara, the crusaders enter into a new agreement with
Alexios Angelos to place him on the throne of the
Byzantine Empire. In response to this diversion, some dissenting crusaders enter a counter-compact to go directly to the
Holy Land. As the crusader army and Venetian fleet make their way to Constantinople, the Greeks they pass along the way pledge their allegiance to Alexios. After the
capture of Constantinople, Alexios makes pledges and gives surety to the army in exchange for its continued support as he establishes his rule. Next, the new emperor contracts a portion of the army to help him pursue the deposed emperor
Alexios III. All of Greece is said to have paid homage to the new emperor, but he reneged on his pledge and did not pay the crusaders for their aid. The army and its patron fall out, the latter is deposed and killed and the crusaders sack the city. The final contracts occur when the Greeks surrender to Boniface while the crusader army elects Baldwin as the new emperor. The
Devastatio contains two errors of dating. It mistakenly dates Peter of Capua's preaching tour to 1202, probably because the author as a German was not directly familiar with events in France. It also places the assault on the harbour wall of Constantinople correctly on 9 April 1204, but incorrectly states that this was during
Holy Week. This error may indicate that the writer was writing long after events. The
Devastatio is devoid of references to the supernatural. Neither does it reference the
East–West schism between the churches. Thematically, however, the account is inspired by . The anonymous author identifies with the rank-and-file, the "poor in the eyes of the world". His attitude has often been labelled anti-Venetian, but it might be better labelled anti-elite. The material success of the barons and Venetians is contrasted with the plight of the poor crusaders. The
Devastatio ends abruptly after noting the payments received by the commoners from the booty taken in Constantinople: "five marks to each foot soldier". ==Notes==