Please answer the following question: What type of details about goncalo de sintra can be gathered from the following bio? Bio: goncalo de sintra or de cintra -lrb- d. 1444/45 -rrb- , was a 15th-century portuguese explorer and slave raider . according to chronicler zurara , goncalo de sintra was a young squire -lrb- '' escudeiro '' -rrb- or stirrup boy in the household of portuguese prince henry the navigator , duke of viseu . others have characterized sintra as older , an illustrious knight -lrb- '' cavaleiro '' -rrb- , distinguished for his military service at ceuta -lrb- although it is possible these were two different men with the same name -rrb- . in late 1444 -lrb- or 1445 -rrb- , henry dispatched goncalo de sintra in command of a caravel on an exploratory expedition down the west african coast , with strict instructions to sail straight to the ' land of guinea ' , and to not detract from that objective . . earlier that year , a portuguese slave-raiding expedition under lancarote de freitas had raided the bay of arguin -lrb- mauritania -rrb- , an area clustered with sanhaja berber fishing settlements , and taken a few hundred berber captives , which were sold as slaves in lagos , portugal at great profit . desirous to make some quick profit of his own , goncalo de sintra disobeyed henry 's instructions and decided to make a quick slave-raiding detour to the arguin banks . but lancarote 's raid had driven much of the local population to evacuate the islands and coasts , with the result that sintra found the fishing settlements deserted . sintra managed to capture two berber women who had lingered on arguin island , but a berber slave-boy sintra had brought from portugal to serve as translator escaped . this turn of events probably persuaded sintra to make an effortful search for captives to ' make up ' for the loss of the slave-boy rather than just call it quits and go on to guinea . according to zurara , goncalo de sintra directed his caravel to nair island -lrb- '' ilha do nar '' -rrb- , at the southern end of arguin bay . at first nair seemed abandoned , like all the other settlements . but taking a handful of crew aboard a...
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