The memoirs of Father Jorge de Hanin

I think your majesty must take towards Mawlay Zidan every necessary precautions, as if towards a dangerous enemy. Because I am well acquainted with his ambitions, his plans and all the help he can obtain from the Dutch. Therefore your Majesty must hinder him so as prevent him from contacting them. You will manage this by not leaving a single port in his command....

Jorge de Hanin, Memoir. Wasf al-mamalik Al-Maribia, Translated from the Spanish by Abdelwahed Akmir, Rabat, IEA, 1997 p. 184-185.