Gil Sanches, an illegitimate son of Sancho I., and we possess a cantar de amigo in Galician-Portuguese, the first literary vehicle of the whole Peninsula, which appears to be the work of Sancho himself, and addressed to his concubine, A.
Alphonso Sanches and D.
As, however, their vehicle was Latin, a mere mention must suffice, and for the same reason only the title of a notable book by Francisco Sanches can be given, the De nobili et prima universali scientia quod nihil scitur.
Their names were among others Alexandre de Gusmao, the Cavalheiro de Oliveira, Ribeiro Sanches, Correa da Serra, Brotero and Nascimento.
The art of letter-writing had cultivators in Abbade Costa, Ribeiro Sanches, physician of Catherine II.