 There are some later records of his involvement, in March 1672, in a raid on Campeche by a band of pirates who attacked and torched a partially built frigate and captured the town.The next day, the same pirates captured a merchant ship loaded with over 120,000 pesos in silver and cargo, when it sailed unknowingly into the harbor.During the late 1670s, de Graaf is reported to have captured a number of vessels, converting each in turn to piracy.