Another reason: because with this prohibition opportunity is given for greater infractions of the law, or that merchandise which went with registry may go without it; for hardly is there a year when there are not voyages of prelates and ministers from Perù to Nueva España, and from Nueva España to Perù. Very recently Archbishop Don Feliciano de Vega and Auditor Don Antonio de Ulloa went from Lima to Mexico, and the bishop of Nueva Vizcaya (who went to fill the see of La Paz) from Mexico to Lima, as well as the auditors who were transferred from the Audiencia of Mexico to that of Lima. All these have to go by the Southern Sea; and it is quite possible that, by undertaking to sail at different times--and, because each one [of those prelates] prefers to go as a superior in his own ship, different vessels convey them--two ships would go from Lima to Acapulco, and three or four from Acapulco to Lima, without either of the viceroys being able to prevent the shipment of much silver in the ships from Perù, and much merchandise in those from Nueva España. Moreover, these four or five ships are double that number, because all of them are chartered by the voyage, going or returning; so neither does the Peruvian ship care to remain in Nueva España, nor that from Nueva España in Perù; thus there will be ten ships, five from each country. And all these were rendered superfluous by the ship that belonged to the permitted trade; for since the latter sailed regularly and provided registry, there was sufficient cause for ordaining that the prelates and auditors should journey in it. This is a reason so evident that, even if there were no other, it would be enough for granting and facilitating this commerce.
On behalf of Nueva España, it is mentioned in the said memorial (no. 92) that more than fourteen thousand persons are occupied in the culture of silk, who, if that should fail them, would perish. This industry has two factors: one is, that there be silk from China as raw material [para labrar] and a market for that of the country. If the commerce with Perù fail them, that market (which is their principal one) is cut off; and thus that industry will cease, and the country will lose the wealth that it has which is based on that industry. Moreover, since the trade of the provinces is so closely connected and bound together, that of España will experience the same or a greater deficiency. For, if those who in Nueva España deal in silks, and are engaged in the silk culture and industry, sustained and enriched themselves with the commerce of Perù, and whatever they gained in that direction converted into the commerce of Castilla--consuming, as they necessarily would, the commodities in which that trade consists--it follows that if the people of Nueva España lack capital, and if that of the 200,000 ducados from Perù fails them, the wealth of Castilla will be thus diminished.