Shown below is a scanned picture from Vasco da Gama's journal which he wrote during his first trip to India.
http://www.fordham.edu/halsall/mod/1497degama.html
Located here is Vasco da Gama's journal which he wrote on his first trip to India
I apologize for the lack of primary sources, but this is the most I could find, even with the extensive time spend on this project