The mistery of Dias (I)

Besides all the textual problems there is also a different set of questions I think we need to clarify along the way: why did Manuel Dias write this text? where did he learn (Western) astronomy and cosmology? what was his knowledge of Chinese astronomy? We already discussed these issues a bit but I am expecting (hoping, actually) that new documents from B. Ajuda or ARSI will shed new light on this.