From the 1730s onwards, the tonnage of Nantes slave-ships was constantly growing, going from a little over 1,000 tonnes in 1735 to 6,000 tonnes in 1740. , p. 6 The years 1750 and 1751 saw a lull in activity, due notably to the fact that ship-owners in Nantes were waiting to discover the results of their post-war investments. , p. 7 A slave-ship's voyage through a system of triangular trade between Europe, Africa and the Americas generally took between 14 and 18 months. by the loss of the exclusive privilege in the trade of slaves from the African coast which had been held by the French East India Company to encourage their participation in the trade, until 31 July 1767. On 30 September 1767, Channel ports (Saint-Malo, Le Havre and Honfleur) were granted exemption from the tax of 10 livres tournois per slave sold in the Antilles. The exemption was extended to La Rochelle on 4 February 1768 and to Bordeaux on 21 March of the same year. by the change of business by ship owners in La Rochelle into the slave trade, seeking to compensate for the fall in fur trade as France lost control of Canada, and so went into competition with their Loire counterparts. , p. 27 During the same period, the number of slaves transported by Nantes ships numbered 200,000. These slaves were taken mainly from the Gulf of Guinea (principally the region of Calabar, on the south east coast of what is now Nigeria) and the "Angola coast" (now part of Angola and the Republic of the Congo), numbered as follows : +Number of slaves transported by Nantes slave-shipsPeriodNumber of slaves1763–176632,3001767–177133,8541772–177835,1611783–178855,9321789–179338,361 Nantes traders were not only capable of adapting to market conditions in both America and Africa, but were also capable of changing the point of sale according to competition. It was, nevertheless, in Saint-Domingue that they sold the majority of their human cargo. Making use of a network of relations across the island, it became the exclusive domain of Loire slave traders. Cap Français (now Cap-Haïtien) and Port-au-Prince were the main points of sale and welcomed, respectively, 30 and 25\% of Nantes slave-ships. The latter dealt with 46.8\% of the supply of provisions to Port-au-Prince, 60.7\% in Léogâne, 64.7\% in Cayes and 81.6\% in Saint-Marc. , pp. 37–38 Industry The slave trade increased the wealth of great merchant and ship-owning families, which they invested in as much in agricultural land, in property (in hôtels particuliers or Lustschloss), as in the growing industry which developed alongside traditional artisanal industry. As a result, in 1775, no less than 17 factories were in business in the city. , p. 194
From the 1730s onwards, the tonnage of Nantes slave-ships was constantly growing, going from a little over 1,000 tonnes in 1735 to 6,000 tonnes in 1740. The years 1750 and 1751 saw a lull in activity, due notably to the fact that ship-owners in Nantes were waiting to discover the results of their post-war investments. A slave-ship's voyage through a system of triangular trade between Europe, Africa and the Americas generally took between 14 and 18 months. by the loss of the exclusive privilege in the trade of slaves from the African coast which had been held by the French East India Company to encourage their participation in the trade, until 31 July 1767. On 30 September 1767, Channel ports (Saint-Malo, Le Havre and Honfleur) were granted exemption from the tax of 10 livres tournois per slave sold in the Antilles. The exemption was extended to La Rochelle on 4 February 1768 and to Bordeaux on 21 March of the same year. by the change of business by ship owners in La Rochelle into the slave trade, seeking to compensate for the fall in fur trade as France lost control of Canada, and so went into competition with their Loire counterparts. During the same period, the number of slaves transported by Nantes ships numbered 200,000. These slaves were taken mainly from the Gulf of Guinea (principally the region of Calabar, on the south east coast of what is now Nigeria) and the "Angola coast" (now part of Angola and the Republic of the Congo), numbered as follows : +Number of slaves transported by Nantes slave-shipsPeriodNumber of slaves1763–176632,3001767–177133,8541772–177835,1611783–178855,9321789–179338,361 Nantes traders were not only capable of adapting to market conditions in both America and Africa, but were also capable of changing the point of sale according to competition. It was, nevertheless, in Saint-Domingue that they sold the majority of their human cargo. Making use of a network of relations across the island, it became the exclusive domain of Loire slave traders. Cap Français (now Cap-Haïtien) and Port-au-Prince were the main points of sale and welcomed, respectively, 30 and 25\% of Nantes slave-ships. The latter dealt with 46.8\% of the supply of provisions to Port-au-Prince, 60.7\% in Léogâne, 64.7\% in Cayes and 81.6\% in Saint-Marc. Industry The slave trade increased the wealth of great merchant and ship-owning families, which they invested in as much in agricultural land, in property (in hôtels particuliers or Lustschloss), as in the growing industry which developed alongside traditional artisanal industry. As a result, in 1775, no less than 17 factories were in business in the city. 
D
, p. 6
D
, p. 7
D
, p. 27
D
, pp. 37–38
D
, p. 194