Original sentence: Archival material for the transatlantic trade in the 16th to 18th centuries may seem useful as a source, yet these record books were often falsified and over inflated to meet the quotas.Olivier Pétré-Grenouilleau has put forward a figure of at least 17 million African people enslaved (in the same period and from the same area) on the basis of Ralph Austen's work
Edited sentence: According to historian Alan W.Archival material for the transatlantic trade in the 16th to 18th centuries may seem useful as a source, yet these record books were often falsified.Fisher, there was a guild of Jewish slave traders in Constantinople, the capital of the Ottoman Empire.Olivier Pétré-Grenouilleau has put forward a figure of 17 million African people enslaved (in the same period and from the same area) on the basis of Ralph Austen's work.The city was a major center of the slave trade in the 15th and later centuries.The guild had about 2000 members.The most significant Jewish involvement in the slave-trade was in Al-Andalus, as Islamic Spain was called