 According to a protocol written by English and French envoys, the Dutch managed during the negotiations to reserve the right to help any natives that concluded treaty relations with them and that such actions would not constitute a violation of the overall armistice.On a sidenote, the formation of the accord was influenced by the writings of Hugo Grotius in "Mare Liberum" ("The Free Seas"), which was published in 1609 at the insistence of the Dutch East India Company; the pamphlet was published anonymously in Leiden roughly one month prior to the conclusion of the treaty.Johan van Oldenbarnevelt and the urban oligarchies of Holland developed another peace treaty in order to prevent any renewed hostilities with Spain once the Treaty of Antwerp expired in 1621.