Morgan's letter of marque gave him permission to attack Spanish ships at sea; there was no permission for attacks on land. Any plunder obtained from the attacks would be split between the government and the owners of the ships rented by the privateers. If the privateers stepped outside their official remit and raided a city, any resultant plunder would be retained by the privateers. Rogoziński observes that "attacks on cities were illegal piracy—but extremely profitable", although Zahedieh records that if Morgan was able to provide evidence of a potential Spanish attack, the attacks on cities were justifiable under the terms of his commission. Morgan's initial plan was to attack Havana, but, on discovering it was heavily defended, this was changed to Puerto Principe (now Camagüey), a town inland. Morgan and his men took the town, but the treasure obtained was less than hoped for. According to Alexandre Exquemelin, who sailed with Morgan, "It caused a general resentment and grief, to see such a small booty". When Morgan reported the taking of Puerto Principe to Modyford, he informed the governor that they had evidence that the Spanish were planning an attack on British territory: "we found seventy men had been pressed to go against Jamaica ... and considerable forces were expected from Vera Cruz and Campeachy ... and from Porto Bello and Cartagena to rendezvous at St Jago of Cuba ".