The question is complicated by the fact that the Sixth Decade of Diogo do Couto, the best contemporary historian of these events, was suppressed by the censor in its original form, and the extant version was revised by an ecclesiastical editor.
For the period 1511-1595, the chief Portuguese authorities are the chronicles of Barros, Correa, Castanheda and Couto (see Portugal: History), with the letters of Xavier (q.v.), and the Tratado of A.
A more moderate and usual view is given by Diego de Couto, who in 1616 speaks of " a dominion over all Kaffraria from the Cabo das Correntes to the great river Zambezi."
The competition for appointments was naturally very keen; Couto mentions the case of one grantee who received the reversion of a post to which 30 applicants had a prior claim.'
The decades, which were continued by Diogo do Couto, a more critical writer and a clear and correct stylist, must be considered the noblest historical monument of the century (see Barros).
Couto is also responsible for some acute observations on the causes of Portuguese decadence in the East, entitled Soldado practico.
The identity of the stories of Buddha and St Josaphat was recognized by the historian of Portuguese India, Dipgo do Couto (1542-1616), as may be seen in his history (Dec. v.