Christian kings isolated Muslim communities by keeping treaty terms secret

Evidence

Uxó, Nules, and Castro so that no one might know the stipulations of the surrender treaties of the other, describing how he cleverly refused to negotiate until the Muslims had eaten, so that the food and wine might put them in a better mood and make them more apt to make concessions. He prides himself in scrupulously respecting his own agreements with his Muslim subjects and presents himself as a fierce defender of their rights: when ambassadors from the Muslim community of Elx come to negotiate, Jaume tells them that if they surrender they will keep houses and possessions and be free to practice their religion (llur llei); the Muslims respond that they have heard that those who trust in the king can rest assured that he will keep his word. — John V. Tolan, Saracens, 917

Categorization

• QUESTION: The ‘food and wine’ tactic — deliberately getting Muslims to eat and drink, presumably against halal norms, to soften them — is a striking manipulation worth verifying.
• CANDY: A conqueror who plied negotiating Muslims with wine to loosen their concessions is a memorable, telling anecdote.