Another potential source of income was the prospect of a Spanish dowry from a marriage between Charles, Prince of Wales, and Infanta Maria Anna of Spain. The policy of the Spanish match, as it was called, was also attractive to James as a way to maintain peace with Spain and avoid the additional costs of a war. Peace could be maintained as effectively by keeping the negotiations alive as by consummating the match—which may explain why James protracted the negotiations for almost a decade.