The Spaniards, who had their main force at St. Augustine, were more or less aggressive, which kept the advanced posts in a state of alarm. John Mohr Macintosh, who had seen service in Scotland, was directed by Oglethorpe to instruct the Highlanders in their military duty, and under his direction they were daily exercised. Hugh MacKay, with a company, had been directed to the immediate command of Oglethorpe. Disputes early arose between the English colonists and the Spaniards regarding the frontier line between the two nationalities, and loud complaints were made by the latter on account of being harrassed by Indians. Oglethorpe took steps to restrain the Indians, and to the Spaniards sent friendly messengers, who were immediately seized and confined and at once took measures against the colonists. A Spanish warship sailed by St. Simon's island and passed Fort St. Andrews, but was not fired upon by the Highlanders because she answered their signals. She made her way back to St. Augustine when the report gained currency that the whole coast was covered with war boats armed with cannon. On June 8th the colonists were again threatened by a Spanish vessel which came close to Fort St. Andrews before she was discovered; but when challenged rowed away with the utmost precipitation. On board this boat was Don Ignatio with a detachment of the Spanish garrison, and as many boatmen and Indians as the launch could hold. It was at this time that a Highland lad named Fraser distinguished himself. Oglethorpe in endeavoring to meet the Spaniards by a flag of truce, or else obtain a conference with them, but unable to accomplish either, and being about to withdraw, saw the boy, whom he had sent forward, returning through the woods, driving before him a tall man with a musket on his shoulder, two pistols stuck in his girdle, and further armed with both a long and short sword. Coming up to Oglethorpe the lad said: "Here, sir; I have caught a Spaniard for you." The man was found to have in his possession a letter from Oglethorpe's imprisoned messengers which imparted certain information that proved to be of great value.