sentences:  Between 1504 and 1507, Portuguese traders imported 287,813 "manillas" from Portugal into Guinea via the trading station of São Jorge da Mina.As the Dutch came to dominate the Africa trade, they are likely to have switched manufacture from Antwerp to Amsterdam, continuing the "brass" manillas, although, as stated, we have as yet no way to positively identify Dutch manillas.Trader and traveler accounts are both plentiful and specific as to names and relative values, but no drawings or detailed descriptions seem to have survived which could link these accounts to specific manilla types found today.